(y^2-3y+2)(y^2+3y-2)=y^2(y+3)(y-3)
1.5y+8y-6y=2y-3
(y^2-3y+2)(y^2+3y-2)=y^2(y+3)(y-3)
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)
y''+y'+2y=x^2-3通解.
求微分方程y”-3y’+2y=5
微分方程y''+2y'-3y=0通解
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
(2y-3)(-y+4)=(y-2)(y-5)-3y(y-7/3)解方程
已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
5(x+y-2)=3-y