Question

y=4x2+28x+47
se completing the square to find the x−intercepts and the vertex of the graph. Answer as ordered pairs.

Answer 1

you do not need to complete the square to find the \(x\) coordinate of the vertex, it is much easier to use \(x=-\frac{b}{2a}\) which in your case is \(-\frac{28}{2\times 2}\)

Answer 2

sorry i misread it, it is
\[-\frac{28}{2\times 4}\]

Answer 3

HOW DID U GET THAT AND IS Y THAT THE FINAL ANSWER