(2x+3y)2次方-(2x+y)(2x-y)-1
{(z+y)(x-y)-(x-y)的2次方+2y(x-y)}除以4y
1、x(x-y)(x+y)-x(x+y)^2
(x+3y)(x-3y)(x的2次方-9y的2次方)
(x-y)的3次方乘(x-y)的2次方乘(y-x)
(x-y)的2次方+3(y-x)因式分解
(1)(x^2/x)-y-x-y
(x-y)的2次方-2(x-y)+(x-y)-5(x-y)
化简:【(x-y)的2次方+(x+y)(x-y)】除以2x,其中x=3,y=1.5
【2(x-y)的3次方-8(x-y)的2次方(x+y)+6y(x-y)的平方】/2(x-y)的平方=?
已知x与y满足2(x-y)-(x-3y)=1/2,求4X次方·2y次方·2y次方-2 2x+1次方·4y次方的值.
因式分解 X的2次方-5(y+1)x+(2y+3)(3y+2)
4根号【(x方+xy+y方)/x-y】*1/2根号【(x方-xy加y方)/x+y】*3根号【(x3次方+y3次方】(x>