9-3y=5y+5

9-3y=5y+5 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 4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11 (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),'.') （x+y-5)*（x+y-5)+（x-y+3)=0 x*x-y*y 2y+5/3y-6-y/2=5y-4/2y-4 2(y-4)(3y+2)-5(-3y+7)(y+1),其中y=-1 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) 已知:3x-5y=0,求x/y,x-y/y,x-y/x 8y-4=12-5y+9y 3(y-3)-5(1+y)=7(y-1) 2(3-2y)+3y =5求y