(5y+1)+ (1-y)= (9y+1)+ (1-3y); 解方程,要求写清步骤 会的帮帮忙,

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 (y-2)(y^2-6y-9)-y(y^2-2y-15),其中y=1/2.先化简再求值. y (3y^2+8y-3)-6y(3y+2y-1)+9y -y - y/1-y +1 (5y+1)+ (1-y)= (9y+1)+ (1-3y); (5y+1)+ (1-y)= (9y+1)+ (1-3y); [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),'.') 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：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 1/2y+1=4y-2/5-y 3(y-3)-5(1+y)=7(y-1) y-(y-1)/2=1-(2y-3)/5 y- 2y+1/2=9- 8-y/4