(x+y)(x-y)-(4x³y-8xy³)求化简
(x+y)(x-y)-(4x³y-8xy³)求化简
已知x²+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
[x(x²y²-xy)-y(x²-x³y)]÷3x²y
因式分解:[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
怎么化简(x-y+4xy/x-y)(x+y-4xy/x+y)(/是分数线)
x⁴+4x³y+6x²y²+4xy³+y⁴=( )
-2y³+(3xy²-x²y)-2(xy²-y³)
计算:(-7x²y)(2x²y-3xy³+xy)
已知y=根号下(x-4)+根号下(4-x)+3,求代数式(x-y+4xy/x-y)(x+y-4xy/x+y)?
x-y/x²÷x²-2xy+y²/xy*(xy-x²)
计算:x•(9x³y-3xy²)/(-3x²y)