x2y2(x+y)-8xy(x+y)+16(x+y)
已知x,y满足等式2x+x2+x2y2+2=2xy,那么x+y的值为( )
计算:[x(x2y2-xy)-y(x2+x3y)]÷3x2y.
计算:[x(x2y2-xy)-y(x2-x3y)]÷3x2y.
x根号x+x根号y/xy-y^2)-(x+根号xy+y/x根号x-y根号)y
化简求值:[x(x2y2-xy)-y(x2-x3y)]÷3x2y,其中x=3,y=-1.
已知x²+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
x-y/x²÷x²-2xy+y²/xy*(xy-x²)
(x+y)(x-y)-(4x³y-8xy³)求化简
计算3x/8y×16y²/27x² (2xy-x²)÷x-2y/xy 2x-6/x
有这样一道题:计算(x-y)[(x+y)(x+y)-xy]+(x+y)[(x-y)(x-y)+xy]的值,其中x=200
(x+y)(x²-xy+y²)—xy(x+y)因式分解
已知x-y=1/xy=3.求x3次方y-2x2y2+xy3