Which equation represents y = x2 + 16x + 70 in vertex form?

y = (x + 8) ² + 6

Step-by-step explanation:

The equation of a parabola in vertex form is

y = a (x - h) ² + k

where (h, k) are the coordinates of the vertex and a is a multiplier

To obtain this form use the method of completing the square

add/subtract (half the coefficient of the x - term) ² to x² + 16x

y = x² + 2 (8) x + 64 - 64 + 70

= (x + 8) ² + 6 ← in vertex form