6x^2y+2xy-3x^2y^2-7x-5yx-4y^2x^2-6x^2y,其中|x+3|+(y-2)^2=0

tianjiaohaiya992022-10-04 11:39:544条回答

6x^2y+2xy-3x^2y^2-7x-5yx-4y^2x^2-6x^2y,其中|x+3|+(y-2)^2=0
^2表示平方,

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rytrw 共回答了18个问题 | 采纳率77.8%: 6x^2y+2xy-3x^2y^2-7x-5yx-4y^2x^2-6x^2y,
=-7x^2y^2-3xy-7x
其中|x+3|+(y-2)^2=0
即x+3=0,y-2=0
x=-3,y=2
原式=-7*9*4-3(-3)*2-7(-3)=-252+18+21=-213; 1年前

可乐天使_hh 共回答了12个问题 | 采纳率: 因为|x+3|+(y-2)^2=0
所以|x+3|=0，(y-2)^2=0。x=-3,y=2
6x^2y+2xy-3x^2y^2-7x-5yx-4y^2x^2-6x^2y，
=-3xy-7x^2y^2-7x
=213; 1年前

啄树鸟共回答了424个问题 | 采纳率: 确定题目没有错吗？; 1年前

sadfheirjgh 共回答了7个问题 | 采纳率: 拜托你发张照片好了^^; 1年前

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