Question

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

Answer 1

x = 0.333, x = -4

Explanation:

3x² + 11x - 4 = 0

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

quadratic formula:

x = -11 ± √(11² - 4(3)(-4)) / 2(3)

x = -11 ± √(121 - -48) / 6

x = -11 ± √169 / 6

x = -11 ± 13 / 6

x = 2/6 = 1/3 = 0.333

x = -24/6 = -4

if you're looking for the value of just b² - 4ac? Then that answer is:

11² - 4(3)(-4) = 169