化简求值:若(x+3)2+|y-2|=0,求代数式x2y-[2xy2-2(xy2-x2y)+x2y]的值.
题型:解答题难度:一般来源:不详
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. |
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