2(5y+1)=2(9y-3)-3y怎么解

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 (3y^2+8y-3)-6y(3y+2y-1)+9y 2(5y+1)=2(9y-3)-3y怎么解 Y的平方+3Y-1=0 y+3-1/y=0 y-1/y=-3 (y-1/y)^2=9 y^2+1/y^2-2=9 y^2+1/y^2=11 (y^2+1/y^2)=121 y^4+1/y^4+y^2+1/y^2-2=9y^2+1/y^2=11那个-2是怎么来的? 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) 通分 y+3/y*y-6y+9,1/2y+6,y-1/y*y-9 10y+2(7y-2)=5(4y+3)+3y怎么算 [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),'.') y-1/2-y+1/3≥y怎么做 y-(y-1)/2=1-(2y-3)/5 y-y-1/2=3-y+2/5 2(y+2)-3(4y-1)=9(1-y)一元一次怎么算? 4(2Y+5)-3Y=7(Y-5)+4(2Y+1) 怎么解 用移向的方法