X2 + 3x - 4 = 0 Find the value of the discriminant. A) 5 B) 6 C) 10 D) 25

Question

Mathematics

Patricia Lamb

28 March, 11:11

X2 + 3x - 4 = 0 Find the value of the discriminant. A) 5 B) 6 C) 10 D) 25

+5

Answers (1)

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Cornelius Ingram · Answer 1

D

Step-by-step explanation:

given a quadratic equation in standard form

ax² + bx + c = 0, then the discriminant is

Δ = b² - 4ac

x² + 3x - 4 = 0 ← is in standard form

with a = 1, b = 3, c = - 4

b² - 4ac = 3² - (4 * 1 * - 4) = 9 - ( - 16) = 9 + 16 = 25 → D