Question

(2x-y)的平方=2(2x-y)+1因式分解

Answer 1

(2x-y)的平方-2(2x-y)+1

=(2x-y-1)^2

(2x-y)的平方+2(2x-y)+1

=(2x-y+1)^2

题目中=是失误.只有两种情况,供选择.