D. Solve the following quadratic inequalities. Write the solution in set and interval
notations.
1. x² + x < 0
2. 4x² > 2x
3. -x² ≥ 3X
4. 6 < x² - X
5. (x + 1)(x-2) ≤ 0
6. x² + 8x +7 <0
7.
x²-3x - 40 ≥ 0
8.
x - 3x² <0
9. 5x → 21 > 8x
10. -2x² + 24 < -5x² - 17x