计算:(2x-3y)×(3y+2x)-(4y-3x)×(3x+4y)
计算:(3x-4y)-[-(2y+x)+(x-3y)]-6x
计算:(9x的平方+4y的平方)(3x+2y)(3x-2y)
计算4xy+(x-2y)的平方+(x+3y)(3y-x)
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
计算:(x-4y)(2x+3y)-(x+2y)(x-y).
计算:(2x-3y)×(3y+2x)-(4y-3x)×(3x+4y)
(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方
已知x-y=1,y≠0,求{(x+2y)²+(2x+y)(x+4y)-3(x+y)(x-y)}÷y的值.
计算 1.(-2x)^3-3x乘(x-2x^2) 2.【(x+2y)^2-(x-2y)(x+2y)】÷4y
计算:(3x-y)2-(2x+y)2+5x(y-x)
(x+y)^2-(3x-2y)^2计算
计算(1)x/x+y-x/x-y (2)a+2+4/a+2 (3)x^2-y^2/xy÷(x+y)