3(Y+1)^2-5(Y+1)(Y-1)+2(Y-1)^2,化简
解方程:3y^2-(2y+1)(y-1)=(y-5)(y+1)
解方程3y^2-(2y+1)(y-2)=(y-5)(y-1)
解方程y-[3y-1]等于5【y+2]
化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1
已知5(y+1)-3y>2(2y+3)+4化简|2y-1|-|1+2y|.
微分方程y''-3y'+2y=5,y(0)=1,y'(0)=2求解过程
[(-x-y)(-x+y)-(x+y)^2-x(y-y^2)}÷1/2y
1、(1-y)^2(1+y)(-1-y)
解3y+5/3y-6=1/2+5y-4/2y-4
(x+2)(x+3) (x-4)(x+1) (y+4)(y-2) (y-5)(y-3)
已知y满足不等式(-y+1/2)-y>2+(y+2/3),化简/y+1/+/2y-1/=_____ 急!
微分方程(1)(y'')^2+5y'-y+x=0;(2)y''+5y'+4y^2-8x=0;(3)(3x+2y)dx+(