diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 3e23e9f..6ed82aa 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -2,8 +2,7 @@
 <project version="4">
   <component name="ChangeListManager">
     <list default="true" id="be5bf74e-ad1c-4197-8a1f-ac93566d8aa7" name="Default" comment="init">
-      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/README.md" afterPath="$PROJECT_DIR$/README.md" />
-      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/推荐/DIN.md" afterPath="$PROJECT_DIR$/推荐/DIN.md" />
+      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/数学/牛顿法/牛顿迭代法求平方根.md" afterPath="$PROJECT_DIR$/数学/牛顿法/牛顿迭代法求平方根.md" />
     </list>
     <ignored path="Reflection_Summary.iws" />
     <ignored path=".idea/workspace.xml" />
@@ -24,7 +23,7 @@
   </component>
   <component name="FileEditorManager">
     <leaf SIDE_TABS_SIZE_LIMIT_KEY="300">
-      <file leaf-file-name="README.md" pinned="false" current-in-tab="true">
+      <file leaf-file-name="README.md" pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/README.md">
           <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
             <state split_layout="SPLIT">
@@ -48,6 +47,30 @@
           </provider>
         </entry>
       </file>
+      <file leaf-file-name="牛顿迭代法求平方根.md" pinned="false" current-in-tab="true">
+        <entry file="file://$PROJECT_DIR$/数学/牛顿法/牛顿迭代法求平方根.md">
+          <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
+            <state split_layout="SPLIT">
+              <first_editor relative-caret-position="60">
+                <caret line="4" column="25" selection-start-line="4" selection-start-column="25" selection-end-line="4" selection-end-column="25" />
+                <folding />
+              </first_editor>
+              <second_editor />
+            </state>
+          </provider>
+          <provider editor-type-id="split-provider[text-editor;MarkdownPreviewEditor]">
+            <state split_layout="SPLIT">
+              <first_editor relative-caret-position="0">
+                <caret line="0" column="0" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
+                <folding />
+              </first_editor>
+              <second_editor>
+                <js_state />
+              </second_editor>
+            </state>
+          </provider>
+        </entry>
+      </file>
       <file leaf-file-name="DIN.md" pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/推荐/DIN.md">
           <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
@@ -117,7 +140,6 @@
         <option value="$PROJECT_DIR$/自然语言处理/GloVe.md" />
         <option value="$PROJECT_DIR$/自然语言处理/CRF.md" />
         <option value="$PROJECT_DIR$/自然语言处理/LDA.md" />
-        <option value="$PROJECT_DIR$/数学/牛顿法/牛顿迭代法求平方根.md" />
         <option value="$PROJECT_DIR$/深度学习/Attention.md" />
         <option value="$PROJECT_DIR$/推荐/YouTubeNext.md" />
         <option value="$PROJECT_DIR$/推荐/DeepFM.md" />
@@ -129,6 +151,7 @@
         <option value="$PROJECT_DIR$/机器学习/逻辑回归/lr.md" />
         <option value="$PROJECT_DIR$/推荐/DIN.md" />
         <option value="$PROJECT_DIR$/README.md" />
+        <option value="$PROJECT_DIR$/数学/牛顿法/牛顿迭代法求平方根.md" />
       </list>
     </option>
   </component>
@@ -223,6 +246,38 @@
               <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
             </PATH_ELEMENT>
           </PATH>
+          <PATH>
+            <PATH_ELEMENT>
+              <option name="myItemId" value="Reflection_Summary" />
+              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.ProjectViewProjectNode" />
+            </PATH_ELEMENT>
+            <PATH_ELEMENT>
+              <option name="myItemId" value="Reflection_Summary" />
+              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
+            </PATH_ELEMENT>
+            <PATH_ELEMENT>
+              <option name="myItemId" value="数学" />
+              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
+            </PATH_ELEMENT>
+          </PATH>
+          <PATH>
+            <PATH_ELEMENT>
+              <option name="myItemId" value="Reflection_Summary" />
+              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.ProjectViewProjectNode" />
+            </PATH_ELEMENT>
+            <PATH_ELEMENT>
+              <option name="myItemId" value="Reflection_Summary" />
+              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
+            </PATH_ELEMENT>
+            <PATH_ELEMENT>
+              <option name="myItemId" value="数学" />
+              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
+            </PATH_ELEMENT>
+            <PATH_ELEMENT>
+              <option name="myItemId" value="牛顿法" />
+              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
+            </PATH_ELEMENT>
+          </PATH>
           <PATH>
             <PATH_ELEMENT>
               <option name="myItemId" value="Reflection_Summary" />
@@ -576,9 +631,9 @@
   </component>
   <component name="ToolWindowManager">
     <frame x="0" y="23" width="1440" height="823" extended-state="6" />
-    <editor active="false" />
+    <editor active="true" />
     <layout>
-      <window_info id="Project" active="true" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.2067239" sideWeight="0.5" order="0" side_tool="false" content_ui="combo" />
+      <window_info id="Project" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.2067239" sideWeight="0.5" order="0" side_tool="false" content_ui="combo" />
       <window_info id="TODO" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="6" side_tool="false" content_ui="tabs" />
       <window_info id="Event Log" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="7" side_tool="true" content_ui="tabs" />
       <window_info id="Database" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="3" side_tool="false" content_ui="tabs" />
@@ -975,16 +1030,6 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/数学/牛顿法/牛顿迭代法求平方根.md">
-      <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
-        <state split_layout="SPLIT">
-          <first_editor relative-caret-position="240">
-            <caret line="16" column="3" selection-start-line="16" selection-start-column="3" selection-end-line="16" selection-end-column="3" />
-          </first_editor>
-          <second_editor />
-        </state>
-      </provider>
-    </entry>
     <entry file="file://$PROJECT_DIR$/自然语言处理/Bert.md">
       <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
         <state split_layout="SPLIT">
@@ -1240,5 +1285,27 @@
         </state>
       </provider>
     </entry>
+    <entry file="file://$PROJECT_DIR$/数学/牛顿法/牛顿迭代法求平方根.md">
+      <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
+        <state split_layout="SPLIT">
+          <first_editor relative-caret-position="60">
+            <caret line="4" column="25" selection-start-line="4" selection-start-column="25" selection-end-line="4" selection-end-column="25" />
+            <folding />
+          </first_editor>
+          <second_editor />
+        </state>
+      </provider>
+      <provider editor-type-id="split-provider[text-editor;MarkdownPreviewEditor]">
+        <state split_layout="SPLIT">
+          <first_editor relative-caret-position="0">
+            <caret line="0" column="0" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
+            <folding />
+          </first_editor>
+          <second_editor>
+            <js_state />
+          </second_editor>
+        </state>
+      </provider>
+    </entry>
   </component>
 </project>
\ No newline at end of file
diff --git "a/\346\225\260\345\255\246/\347\211\233\351\241\277\346\263\225/\347\211\233\351\241\277\350\277\255\344\273\243\346\263\225\346\261\202\345\271\263\346\226\271\346\240\271.md" "b/\346\225\260\345\255\246/\347\211\233\351\241\277\346\263\225/\347\211\233\351\241\277\350\277\255\344\273\243\346\263\225\346\261\202\345\271\263\346\226\271\346\240\271.md"
index 095aaf5..2fb59ff 100644
--- "a/\346\225\260\345\255\246/\347\211\233\351\241\277\346\263\225/\347\211\233\351\241\277\350\277\255\344\273\243\346\263\225\346\261\202\345\271\263\346\226\271\346\240\271.md"
+++ "b/\346\225\260\345\255\246/\347\211\233\351\241\277\346\263\225/\347\211\233\351\241\277\350\277\255\344\273\243\346\263\225\346\261\202\345\271\263\346\226\271\346\240\271.md"
@@ -2,6 +2,7 @@
 - ![](https://tva1.sinaimg.cn/large/006y8mN6gy1g9bfple4x4j303x00i742.jpg)
 - ![](https://tva1.sinaimg.cn/large/006y8mN6gy1g9bfr2t8flj306l00mmwz.jpg)
 - ![](https://tva1.sinaimg.cn/large/006y8mN6gy1g9bfruh1klj3043015wea.jpg)
+    - 这边是2次，所以直接以y=x^2化简了
 
 # 实现它
 ```