Question

Using the quadratic formula, find the solution to 3x2+18x+24=0
.(1 point)
Responses

x=4
, x=2
x equals 4 , x equals 2

x=−2
, x=−4
x equals negative 2 , x equals negative 4

x=−2
x equals negative 2

x=−4

Answer 1

Use a=3, b=18, c=24.
Discriminant Δ = b^2 − 4ac = 18^2 − 4·3·24 = 324 − 288 = 36, sqrtΔ = 6.
x = [−18 ± 6]/(2·3) = [−18 ± 6]/6 → x = −2 or x = −4.