Answer:
x = -¾ or x = + 3
Step-by-step explanation:
You can use:
- Factorization method
- Quadratic formula
- Completing the square method
I am using factorization method.
4x² - 9x - 9
4x² * - 9 = - 36x²
- 12x + 3x = 9x
- 12x * + 3x = 36x²
4x² - 12x + 3x - 9 = 0
(4x² - 12x) + (3x - 9) = 0
4x(x - 3x) + 3(x - 3) = 0
(4x + 3) + (x - 3) = 0
4x + 3 = 0 or x - 3 = 0
4x = - 3 or x = + 3
x = -¾ or x = + 3
