Question

Graph the quadratic y=4x^2+3x−8
. What is the vertex of this quadratic?(1 point)
Responses

(−1.838,0)

left parenthesis negative 1.838 comma 0 right parenthesis

(−0.375,−8.563)

left parenthesis negative 0.375 comma negative 8.563 right parenthesis

(0,−8)

left parenthesis 0 comma negative 8 right parenthesis

(1.088,0)

Answer 1

Vertex x = -b/(2a) = -3/(2·4) = -3/8 = -0.375.
y = 4(-3/8)^2 + 3(-3/8) - 8 = -8.5625 ≈ -8.563.

So the vertex is (-0.375, -8.563).