2y=4y-6=24

(y^2)^4y-(-2y)^3y^6= 2y+5/3y-6-y/2=5y-4/2y-4 先化简,在求值：6y-(y+2分之y + 2-y分之y)除以y³-4y-2y²+8分之y,其中y= -2分之5先化简,在求值：6y-(y+2分之y + 2-y分之y)除以y³-4y-2y²+8分之y,其中y= -2分之5 y^2-6y-2÷2y-4= 2-（4-y)=6y-2（y+1) 2-(4-y)=6y-2(y+1) y^-6y-2;2y-4=多少? y(5y-2)=6-4y 解方程 解方程 4y-2=y-6+7y |2y-6|=9+4y 数学题=y(y+3)-4(y+3)2=(y+3)(y-4y-12) 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) 2y=4y-6=24 4y(y-1)=3 3y^2+2√6y=-2 {3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1 （x+y）/2- x-y/2=6 3(x+y)=4(x-y) x+y/3+x-y/2=6 4(x+y)-2(x-y)=40 解3y+5/3y-6=1/2+5y-4/2y-4