y (3y^2+8y-3)-6y(3y+2y-1)+9y

1.5y+8y-6y=2y-3 【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)( 1.（（y+2x)(-2x+y)+4(x+2y)^2)/3y 2.（2(x-y)^3-8(x-y）^2(x+y)+6y( 解方程3y^2-(2y+1)(y-2)=(y-5)(y-1) 解方程：3y^2-(2y+1)(y-1)=(y-5)(y+1) 解方程y-[3y-1]等于5【y+2] 解3y+5/3y-6=1/2+5y-4/2y-4 解方程：(y+4)/5+y+6=(y+8)/2-(y+4)/3 {3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1 Y. 解不等式：5y(8-y)-3y(5-3y)+2y(7-2y)>-39