5x^y-[2x^2y-3(xy^2-2x^2y+2xy^2)],其中x,y满足|x-1|+(y+2)^2=0

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5x^y-[2x^2y-3(xy^2-2x^2y+2xy^2)],其中x,y满足|x-1|+(y+2)^2=0

先化简,再求值

如果及时还给悬赏!急!

优质解答：

5x^y-[2x^2y-3(xy^2-2x^2y+2xy^2)]

=5x^y-[2x^2y-3xy^2+6x^2y-6xy^2]

=5x^y-2x^2y+3xy^2-6x^2y+6xy^2

=5x^y-8x^2y+9xy^2

|x-1|+(y+2)^2=0

所以 x-1=0 y+2=0

x=1 y=-2

代入上式得 5*1^-2-8*(-2)+9*(-2)^2

=5+16+36

=21+36

=57

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