Quadratic Formulas To Solve Quadratic Functions

1. -3x^2-8x+16=0

2. x^2-9=0

3. x^2+16=8x

4. 2x^2-5x-12=0

5. 3x^2+5x=0

6. x^2-8x+15=0

7. 4x^2+x-3=0

Please show your work! My teacher takes it for a grade.

(I know it's a lot I'm sorry I'm just really behind and having this done would really help me out)​