For the first problem, I see a quadratic problem that you can solve either by factoring or using the quadratic formula!
Ill give this a go:
this can be factored. I know right away because I look at the discriminant which when solved yields a perfect square of 1089.
There for z = 1/4 and -8
I only took grade 11 functions, but just looking at your problem, I hope what I did helps!