已知x、y满足(x-1)(x-1)+|y+2|=0,求代数值2xy(3/4x²-1/2y²)-6xy(1/2x²-1/6y²)的值
问题描述：
已知x、y满足(x-1)(x-1)+|y+2|=0,求代数值2xy(3/4x²-1/2y²)-6xy(1/2x²-1/6y²)的值
你们的答案怎么不一样啊
答
(x-1)(x-1)+|y+2|=0
x-1=0,y+2=0
x=1,y=-2
2xy(3/4x²-1/2y²)-6xy(1/2x²-1/6y²)
=-3/2x^3y
=3