4x^2 - 9x - 9 = 0 factor as
(4x + 3) (x - 3) = 0
Setting each factor to 0 and solving for x gives that x = -3/4 or x = 3
3x^2 + 14x + 8
We can write this as
3x^2 + 12x + 2x + 8 factor by grouping
3x(x + 4) + 2(x + 4) take out the GCF = x + 4
(x + 4) (3x + 2)