(3x^2+2y^3)(-3x^2+2y^3)
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)
化简:5根号X^3Y-2Y根号XY-6根号XY+根号X分之Y+根号Y分之X
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
根号(2X-Y)^2=3,三次根号(X-2Y)^3=-3,求(X+2Y)/(X-Y)
因式分解-1/4x^3+x^2y-x^2y
(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方
(X^3Y^2)^3+(-2X^3Y^3)^2×X^3
2(x-y)+3(x+y)2-5(x-y)-8(x+y)2-(x-y)
已知y=根号x-2+根号2-x+3,求y^x的平方根
3(x^4)^3-2(xy)^4x^8y+5(x^3y^2)x^6y
(2/3x-2/x+y(x+y/3x-x-y))÷x-y/x,其中5x+3y=0