2(6x+4y)化简412222222
化简(x+y)-(2x+y/2)-(3x+y/6)-(4x+y/12)-(5x+y/20)-……-(10x+y/90)
化简:(2x-y)²-4(x-y)(x+y)
化简:【(2x-y)(2x+y)+y(y+6x)】÷2x
化简 3(X-Y)²-4(X-Y)+7(X-Y)-6(X-Y)²
化简:{(x+2y)(2y-x)-4y(-x+y) } / (-2x)
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
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
4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6
x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8
[(x+2y)^2-(x-2y)^2-(x-2y)(x+2y)-4y^2]/2x 化简