9 Quesions, 30 Points!!!! PLEASE HELP!

Note: I'm afraid I can't put the work for the answers, for lack of time =/
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1. 0 or -3

2. 0 or 4

3. -2 or 3

4. 0 or 1/2

5. -2 or 3

6. 0 or 5

7. 0 or 7

8. 0 or -2
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9. Substitute 0 for h in "h = -16x^2 + 16x" then solve for x
0 = -16x^2 + 16x

Subtract -16x^2+16x from both sides.
0−(−16x2+16x)=−16x2+16x−(−16x2+16x)
16x2−16x=0

Factor the left side of the equation
16x(x−1)=0

Set factors to equal 0
16x=0 or x−1=0
x = 0 or x = 1