exam Maths Puzzle Numerical Ability

I am having difficulty with this problem. Here is what I did but the answer is not correct and I do not know what I am doing wrong. I looked up the problem to make sure that I have

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y=-7;(-7,0) 1)what are all solutions of
x^2+8x-6=0

2) what are all solutions of
3/4(x+1)^2=9

3) what are all solutions of
2/3(x-3)^2=4

4) What quadratic function represents a por