作业帮(4-y)^2-4(1-y)(3+6y)
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(4-y)^2-4(1-y)(3+6y)
(4-y)^2-4(1-y)(3+6y)
(4-y)^2-4(1-y)(3+6y)
BanAn049
是因式分解吧?
(4-y)²-4(1-y)(3+6y)
=y²-8y+16-4(3+3y-6y²)
=y²-8y+16-12-12y+24y²
=25y²-20y+4
=(5y)²-20y+2²
=(5y-2)²
(y^2)^4y-(-2y)^3y^6=
(4-y)^2-4(1-y)(3+6y)
计算：[(y+1)/(y^2-4y+3)减去(y-2)/(y^2-6y+9)]除以(y-5)/(y-1)
常微分方程的通解dy/dx=(x-y+1)/(x+y-3)y^4=2y^n+y=0y''+6y'+9y=e^(-3x)y''+y'-2y=4e^(2x)
y (3y^2+8y-3)-6y(3y+2y-1)+9y
解3y+5/3y-6=1/2+5y-4/2y-4
4y(y-1)=3 3y^2+2√6y=-2
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
计算（3y-1)(2y+3)-(6y-5)(y-4)
（3y-1)(2y-3)+(6y-5)(y-4)=?xie
(3y－1)(2y一3)十(6y一5)(y一4)
（3y-1)(2y-3)+(6y+5)(y-4)=?
（y+1)分之（2y+3)=（3y+4）分之（6y+7）
4y²-4y/y²-2y+1÷(y+1/y-1-y-1/y+1)÷(3y+3)
6y-(y+2分之y+2-y分之y)÷(y^3-4y-2y^2+8分之y) 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),'.')
2y+5/3y-6-y/2=5y-4/2y-4
(y-4)(3y+2)-(3y-7)(2y+1),其中y=4/3