Question

Find the discriminant and the number of real roots for this equation.
9x2 + 12x + 4 = 0

Answer 1

A, 0; one real root

Explanation:

Just took the quiz it’s correct

Answer 2

discriminant = 0

The real root -2/3

Explanation:

The formula for discriminant : b^2 - 4ac

12^2 (-4)×9×4 = 144 - 144 ➡ discriminant = 0 this means the roots is a repeated real number, which means there's only one solution

(3x + 2) × (3x + 2) = 0

3x+ 2 = 0

x = -2/3