(x-5)平方=2(x-5)怎么算?

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(x-5)平方=2(x-5)怎么算?(x-5)平方=2(x-5)怎么算?(x-5)平方=2(x-5)怎么算?(x-5)^2=2(x-5)x^2-10x+25=2x-10x^2-12x+35=0(x-7

(x-5)平方=2(x-5)怎么算?
(x-5)平方=2(x-5)怎么算?

(x-5)平方=2(x-5)怎么算?
(x-5)^2=2(x-5)
x^2-10x+25 = 2x-10
x^2-12x+35 =0
(x-7)(x-5) =0
x = 5 or 7

(x-5)^2=2(x-5)
(x-5)^2-2(x-5)=0
(x-5)(x-5-2)=0
(x-5)(x-7)=0
所以x=5 或 x=7

x^2-10x+25-2x+10=0
x^2-12x+35=0
x=5 x=7

由题 (x-5)(x-5-2)=0
所以,x=5 或 x=7

(X-5)²=2(X-5)
X²-10X+25=2X-10
X²-12X+35=0
(X-5)(X-7)=0
X1=5 X2=7