(1)10y-5y-2=20-2y-2 (2)12(3x-1)-8(5-2x)=6(5x+3)-48 (3)-0.4x-1.5=1.2 现在就要,急!

y(y-2)²-y(y+3)(y-5) y=1/2 化简求值 y(y-2)²-y(y+3)(y-5) y=1/2 化简求值 y(y-2)²-y(y+3)(y-5) y=1/2 化简求值 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：3y²-(2y+1)(y-2)=(y-5)(y+1) 2(y-4)(3y+2)-5(-3y+7)(y+1),其中y=-1 方程y''=(1+y'*y')/2y的通解 [T,Y]=ode45(@rigid,[0 1],[rand(15,1)]);plot(T,Y(:,1),'-',T,Y(:,2),'-.',T,Y(:,3),'.',T,Y(:,4),'-',T,Y(:,5),'-.',T,Y(:,6),'.',T,Y(:,7),'-',T,Y(:,8),'-.',T,Y(:,9),'.',T,Y(:,10),'-',T,Y(:,11),'-.',T,Y(:,12),'-.',T,Y(:,13),'.',T,Y(:,14),'-',T,Y(:,15),'.') -1+y+20y^2 y'=1+y^2 已知y^2-5y=20,求(y-1)(2y-1)-(y+1)^2+1的值 y-y-1/2=2-y+5/5一元一次方程 1/2y+1=4y-2/5-y y-(y-1)/2=1-(2y-3)/5 y-y-1/2=3-y+2/5 y-2分之y-1=-5分之y+2 10+5y+y^2=0