Question

(x y)(x y-1) +1/4的因式分解

Answer 1

（x+y）（x+y-1）+4分之1
=（x+y）²-（x+y）+（2分之1）²
=（x+y）²-2×（x+y）×（2分之1）+（2分之1）²
=（x+y-2分之1）²

Answer 2

=（xy)^2-xy+(1/2)^2
=（xy)^2-2*xy*1/2+(1/2)^2
=(xy-1/2)^2

谢谢采纳！！！