Question

What is the vertex of this quadratic function?
f(x) = 2x^2 + 4x – 5

Answer 1

want to solve it graphically or algebrically?

Answer 2

\(\textbf{HINT}\) Complete the square.

Answer 3

would it be (-1,-7)?

Answer 4

The vertex of the quadratic function \(\large f(x)=ax^2+bx+c \) occur at (h, k) where
h=-b/(2a)
k=f(h)

Answer 5

Indeed, that's another way.

Answer 6

complete the square to get your equation into vertex form: \(y = a(x – h)^2 + k\)
or you could do \(x=-{b\over2a}\) to find the x value of the vertex and then plug in the \(x\) into the function to get he y-value

Answer 7

@venom936 , yes your answer is correct