Question

What is the discriminant of the quadratic equation 2x + 5x2 = 1? –18 –16 22 24

Answer 1

D.24

Step-by-step explanation: hope this helps!! :)

Answer 2

24

Explanation:

Given a quadratic equation in standard form, ax² + bx + c = 0 (a ≠ 0 )

Then the discriminant is

b² - 4ac

Given

2x + 5x² = 1 ( subtract 1 from both sides )

5x² + 2x - 1 = 0 ← in standard form

with a = 5, b = 2, c = - 1 , then

b² - 4ac = 2² - (4 × 5 × - 1) = 4 - (- 20) = 4 + 20 = 24