-3-2×{2X-(4Y-2X)}
(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
x/x-y*y^2/x+y-x^3y2/x^4-y^4/x^2/x^2+y^2
(3x-y)²-2x(4x-5y)-(x+2y)²
计算:(3x-4y)-[-(2y+x)+(x-3y)]-6x
(x+3y-4)(2x-y)
(2x+y)(2x-3y)+x(2y+y) 2a(x-y)-4b(x-y)
计算 1.(-2x)^3-3x乘(x-2x^2) 2.【(x+2y)^2-(x-2y)(x+2y)】÷4y
计算【3(x-y)^2(x+y)^-2/4(x+y)^2(x-y)^-2】^-2
4x*3-4x*2y-(x-y)因式分解
4x^3-4x^2y-(x-y)因式分解
(2x-y)(2x+y)-2(3x-4y)(4y+3x)