(4-y)^2-4(1-y)(3+6y)
解3y+5/3y-6=1/2+5y-4/2y-4
{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(
计算(4x^2-2x^3+6x)/(-2x)-(x-1)^2y^2-4/y^2-y-6)+(y+2/y-3)/(y+1/
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=
计算(2y+1)^2×(2y+1)^3+(2y+1)^4【-(2y+1)】
(x+2)(x+3) (x-4)(x+1) (y+4)(y-2) (y-5)(y-3)
解方程:(y+4)/5+y+6=(y+8)/2-(y+4)/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
{4/(x+y)+6/(x-y)=3 {9/(x-y)-1/(x+y)=1