# Jen knows that (-1,41) and (5, 41) lie on a parabola defined by the equation #y=4x^2-16x+21. What are the coordinates of the vertex?

##### 1 Answer

Nov 22, 2016

Coordinates of vertex are

#### Explanation:

As the equation is of the form of

As points

And hence symmetric axis is

Hence coordinates of vertex are

graph{y=4x^2-16x+21 [-10, 10, -10, 68.76]}