Solve quadratic equation by factoring with solution
4. -4x² = 6x ?
5. x² + 8x + 12 = 0 ?
6. x² + 4x - 21 = 0 ?
7. x² - 14x = -24 ?
8. 2x² - 12 = 2x ?
9. 2x² + 5x + 2 = 0 ?
10. 3x² - 5x = 12 ?

need help :(​