(-x-2y)(x2-2xy+4y2)等于多少
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(-x-2y)(x2-2xy+4y2)等于多少
(-x-2y)(x2-2xy+4y2)
等于多少
(-x-2y)(x2-2xy+4y2)等于多少
(-x-2y)(x-2y)^2
=-(x+2y)(x-2y)^2
计算(x+y/x-y + 4xy/y2-x2)(x2-9y2)/(x2+2xy-3y2)
4x2-y2/x2-2xy+y2 +(2x-y)/2x2-2xy
x2-2xy+y2=4 x2+y2-x-y=6 解不等式x2-2xy+y2=4 x2+y2-x-y=6 解不等式
已知x2+4y2+x2y2+1=6xy,则(x4-y4)/(2x2+xy-y2)*(2x-y)/(xy-y2)/(x2+y2/y)2=
因式分解x2-4xy+4y2+x-2y-2
x2-4xy+4y2-x+2y-2因式分解
(-x-2y)(x2-2xy+4y2)等于多少
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已知x/y=2,求(x+y)2-4xy/x2+y2
题如下、 已知2x+y=0,求x2+xy分之x-2y乘以(x2-y2)除以x分之x2-4xy+4y2的值.求(X2+XY)分之(X-2Y)乘以(X2-Y2)除以(X)分之(X2-4XY+4Y2)的值
若x-y/x+y=2,则x2+2xy+y2/4xy=多少
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已知:x/2=y/3=z/4,求(x2+y2-z2-2xy)/(x2-y2+z2-2xz)除以(x2-y2-z2+2yz)/(x2+y2-z2+2xy)