Question

What is the the vertex of `y =3x^2+5x+8`?

Answer 1

Vertex (-5/6, 213/36

Explanation:

x-coordinate of vertex:
`x = -b/(2a) = - 5/6`
y-coordinate of vertex:
`y (-5/6) = 3(25/36) - 5(5/6) + 8 = 75/36 - 25/6 + 8 =`
`= 75/36 - 150/36 + 288/36 = 213/36`

Vertex (-5/6, 213/36)