Question

What are the coordinates of the vertex of the graph of y = x2 + 8x + 1?

Answer 1

y= x2 + 8x - 1 is y=(x+4) 2-17

Explanation:

First find - b/2 = - 4, so -4 will be added to x inside the parenthesis.

Next , find c - b2 to find the value you added at the end

y= (x- b2) 2 + c - b2

y= (x+4) 2 - 17