Would like a bit of help on a maths quiz. No 1...I know what I am supposed to do, factorising, and putting a,b,c into the x = b+/- sqrt(b^2 etc etc formula... but im getting the wrong answer. So maybe my factorising is wrong... Can someone show me a step by step process for this question.

And No 2, Im a bit lost, so any help would be appreciated.

1)Give the turning point of the following quadratic and state whether it is a maximum or minimum.

y = (−8+9x) (−4x−5)

2) If a^2 = b^2 + 3 and a − b = 6, what is a + b? Please give an exact answer, using fractions if necessary; no decimals.