3分之2y²+3分之1y-2=0

3分之2y²+3分之1y-2=0
3分之2y²+3分之1y-2=0

3分之2y²+3分之1y-2=0
3分之2y²+3分之1y-2=0
两边同时乘以3,得
2y²+y-6=0
(2y-3)(y+2)=0
y=2分之3或y=-2

2/3 y² + 1/3y - 2 = 0
y² + 1/2y - 3 = 0
y² + 1/2y = 3
(y+1/4)² = 3+1/16 = 49/16
y+1/4 = ±7/4
y = -1/4±7/4 = -2，或3/2