x = - 0.67
Step-by-step explanation:
Step 1:
Solve for x using quadratic formula for the equation 9x² + 12x + 4 =0
Here, a = 9, b = 12 and c = 4
⇒ x = (- b ±√b² - 4ac)/2a
⇒ x = (-12 ±√144 - 4×9×4)/18
⇒ x = (-12 ±0)/18 = -12/18 = -2/3
⇒ x = - 0.67
