Question

3 (x-5)的平方=2(5-x) 3(x-5)^2+2(x-5)=0

3(x-5)^2+2(x-5)=0这步是怎么来的

Answer 1

3 (x-5)的平方=2(5-x) ?

3 (x-5)的平方=-2(x-5)

3 (x-5)的平方+2(x-5)=0
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