Question

Using the quadratic equation to solve 3x 2 + 11x - 4 = 0, the value of b 2 - 4ac is -26 169 73.

Answer 1

b² - 4ac = 169

Explanation:

given a quadratic equation in standard form

ax² + bx + c = 0 ( a ≠ 0 ) , then the discriminant is

b² - 4ac

given

3x² + 11x - 4 = 0 ← in standard form

with a = 3 , b = 11, c = - 4 , then

b² - 4ac = 11² - (4 × 3 × - 4) = 121 - (- 48) = 121 + 48 = 169