2y^2-10.5y+12
(x-y)^2+12(x-y)+36
解分式方程6y+12/y^2+4y+4 -y^2-4/y^2-4y+4 +y^2/y^2-4=0
2y''+y'-y=0
分解因式(y^2-y)^2-8(y^2-y)+12
4(x+y)^2-12(x+y)(x-y)+9(+y)^2因式分解,
约分y^2+y-2/y^2+4y+4
1.5y+8y-6y=2y-3
不定积分 (sin1/y)/ y^2
[(-x-y)(-x+y)-(x+y)^2-x(y-y^2)}÷1/2y
{(z+y)(x-y)-(x-y)的2次方+2y(x-y)}除以4y
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=
(y^2-3y+2)(y^2+3y-2)=y^2(y+3)(y-3)