8(x+1/x)2" role="presentation" style="background-color:rgb(252, 252, 255); border:0px; color:rgb(20, 20, 20); direction:ltr; display:inline; float:none; font-family:open sans,sans-serif; font-size:14.6667px; line-height:normal; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; overflow-wrap:normal; padding:0px; position:relative; white-space:nowrap" class="MathJax">2+ 4(2" role="presentation" style="background-color:rgb(252, 252, 255); border:0px; color:rgb(20, 20, 20); direction:ltr; display:inline; float:none; font-family:open sans,sans-serif; font-size:14.6667px; line-height:normal; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; overflow-wrap:normal; padding:0px; position:relative; white-space:nowrap" class="MathJax">x2 + 1/2" role="presentation" style="background-color:rgb(252, 252, 255); border:0px; color:rgb(20, 20, 20); direction:ltr; display:inline; float:none; font-family:open sans,sans-serif; font-size:14.6667px; line-height:normal; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; overflow-wrap:normal; padding:0px; position:relative; white-space:nowrap" class="MathJax">x2)2" role="presentation" style="background-color:rgb(252, 252, 255); border:0px; color:rgb(20, 20, 20); direction:ltr; display:inline; float:none; font-family:open sans,sans-serif; font-size:14.6667px; line-height:normal; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; overflow-wrap:normal; padding:0px; position:relative; white-space:nowrap" class="MathJax">2- 4(2" role="presentation" style="background-color:rgb(252, 252, 255); border:0px; color:rgb(20, 20, 20); direction:ltr; display:inline; float:none; font-family:open sans,sans-serif; font-size:14.6667px; line-height:normal; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; overflow-wrap:normal; padding:0px; position:relative; white-space:nowrap" class="MathJax">x2 + 1/2" role="presentation" style="background-color:rgb(252, 252, 255); border:0px; color:rgb(20, 20, 20); direction:ltr; display:inline; float:none; font-family:open sans,sans-serif; font-size:14.6667px; line-height:normal; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; overflow-wrap:normal; padding:0px; position:relative; white-space:nowrap" class="MathJax">x2) + (x+1/x)2" role="presentation" style="background-color:rgb(252, 252, 255); border:0px; color:rgb(20, 20, 20); direction:ltr; display:inline; float:none; font-family:open sans,sans-serif; font-size:14.6667px; line-height:normal; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; overflow-wrap:normal; padding:0px; position:relative; white-space:nowrap" class="MathJax">2 = (x-4)2" role="presentation" style="background-color:rgb(252, 252, 255); border:0px; color:rgb(20, 20, 20); direction:ltr; display:inline; float:none; font-family:open sans,sans-serif; font-size:14.6667px; line-height:normal; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; overflow-wrap:normal; padding:0px; position:relative; white-space:nowrap" class="MathJax">2
Đặt góc H=x; góc E=y
=>x=y+10 và x+y=360-60-50=250
=>2y+10=250
=>y=120
=>x=130