6×(2x+y/3-3x-2y/6)化简
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
化简:x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)
因式分解3x^2(x-y)+6x(y-x)
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
因式分解 (1)6(x-y)^3-3y(y-x)^2 (2)x(x-y)(a-b)-y(y-x)(
计算:(3x-4y)-[-(2y+x)+(x-3y)]-6x
化简(x+y)-(2x+y/2)-(3x+y/6)-(4x+y/12)-(5x+y/20)-……-(10x+y/90)
先化简,在求值:(x-y)²+(3x-2y)(2x+y)-x(6x-y)
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方
2(2x+3y)(3x+2y)-(6x-y)(2x-5y)
x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20
{(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20