﹣﹙﹣xy﹚^2(x^2-xy-y^2)+﹙x^2y)^2 计算题啊
(2×y+x²-y²)-(x²-y²-3xy) 计算题,
计算题(-3x^2y^2+6x^2y^2-1/3xy)÷(-1/3xy)
计算题:(-3x^2y^3+6x^2y^2-1/3xy)÷(-1/3xy)
有这样一道计算题:“计算(2x³-3x²y-2xy²)-(x³-2xy²
有这样一道计算题:“计算(2x²-3x²y-2xy²)-(x²-2xy²
[xy(x²-3y)+3xy²]﹙﹣2xy﹚+x³y²﹙2x-y﹚ 其中x=﹣1
一道计算题:(2x^3y^2-3x^2y+4xy^3)/(-2x)/(-y)
(xy-x^2)乘以(xy)/(x-y)
数学分式计算题:(x^2-4y^2)/x^2+2xy+y^2÷x+2y/2x^2+2xy.
数学计算题(0.3x³+x²y-2xy²)-(0.5x³-2x²y+1
已知xy=﹣2,x-y=3,求代数式﹙3xy-7y﹚+[4x-﹙3xy-y-2x﹚]的值
先化简再求值xy﹙x²+y﹚-y²﹙xy+2x﹚-3xy²,其中x=5,y=﹣1