(x-5)²-2(x-5)=0
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![(x-5)²-2(x-5)=0](/uploads/image/z/12537786-66-6.jpg?t=%EF%BC%88x-5%29%26%23178%3B-2%EF%BC%88x-5%EF%BC%89%3D0)
(x-5)²-2(x-5)=0
(x-5)²-2(x-5)=0
(x-5)²-2(x-5)=0
原式变为
(x-5)(x-5-2)=0(提取公因式x-5)
(x-5)(x-7)=0
x1=5
x2=7
请采纳
(x-5)²-2(x-5)=0
解 去括号 X2-10X+25-2X+10=0
X2-12X+35=0
(X-7)(X-5)=0
X=7或X=5
注X2为 X的平方
(X-5)²-2(X-5)+1=1
(X-5-1)²=±1
X-6=±1
X=5或X=7