Question

I need some help to see where I went wrong with this....pls help

2h^2-h-3=0
(2h-3)(h+1) = 0
2h^3+2h-3h-3h=0
2h^3-h-3=0
2h^2=3
h^2=3/2

Answer 1

2h^2-h-3=0

(2h-3)(h+1) = 0
so
2 h-3 = 0
h = 3/2
or
h+1 = 0
h = -1