问题
解答题
化简求值:若(x+3)2+|y-2|=0,求代数式x2y-[2xy2-2(xy2-x2y)+x2y]的值.
答案
x2y-[2xy2-2(xy2-x2y)+x2y]
=x2y-(2xy2-2xy2+2x2y+x2y)
=x2y-2xy2+2xy2-2x2y-x2y
=-2x2y,
∵(x+3)2+|y-2|=0,
∴x+3=0且y-2=0,
解得:x=-3,y=2,
则当x=-3,y=2时,原式=-2×9×2=-36.