1.5y+8y-6y=2y-3
1.5y+8y-6y=2y-3
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
先化简,在求值:6y-(y+2分之y + 2-y分之y)除以y³-4y-2y²+8分之y,其中y=
解方程:(y+4)/5+y+6=(y+8)/2-(y+4)/3
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
【2(x-y)的3次方-8(x-y)的2次方(x+y)+6y(x-y)的平方】/2(x-y)的平方=?
(y^2-3y+2)(y^2+3y-2)=y^2(y+3)(y-3)
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
解3y+5/3y-6=1/2+5y-4/2y-4
6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5