(2x-y)乘(2x+y)+(2x-y)乘(y-4x)+2y(y-3x)
(x-y)的3次方乘(x-y)的2次方乘(y-x)
计算 1.(-2x)^3-3x乘(x-2x^2) 2.【(x+2y)^2-(x-2y)(x+2y)】÷4y
(x-y)的3次方乘(y-x)的2次方乘(y-x)的5次方
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
已知x+y=a,求(x+y)的立方乘(2x+2y)的立方乘(3x+3y)的立方的值.
(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方
(x+y分之x + x+y分之2y)乘x+2y分之xy 除以(x分之1+y分之1)同样用两...
(X+Y分之X+X+Y分之2Y)乘X+2Y分之XY除以(X分之1+Y分之1)要有过程
(x-y/x+2y)³
{(x-y)²+(x+y)(x-y)}÷2x
已知x-y=1,y≠0,求{(x+2y)²+(2x+y)(x+4y)-3(x+y)(x-y)}÷y的值.
(x-y)(x-2y)-(3x-2y)(x-3y)