1/2{1/2［1/2(1/2y-3)-3］-3}=1

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(1-3y)^2+(2y-1)^2=13(y-1)(y+1) (3x-y)^2+(3x+y)(3x-y),x=1,y=-2 y-{y-2x+［5x-3(y+2x)+6y］},其中x= - 1/3,y= 1/8. 解3y+5/3y-6=1/2+5y-4/2y-4 解方程y-[3y-1]等于5【y+2] 微分方程y''=3√y,x=0,y=1,y'=2 [(2x+y)^2+(y+2x)(y-2x)-2y(4x-y)]/4y,其中x=1/2,y=1/3 {3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1 解方程,3y^3+(y+3)(6-2y)+3y(y+2)(2-y)-2(y^2+1)=0 y+y^-1=3 求y+y^-2等于几