What is the vertex?

Question

y=4x^{2 + 2x - 15}

Answer 1

y = 4x² + 2x - 15

 

This quadratic equation is standard form, y = ax² + bx + c, where a = 4, b = 2, and c = -15.  The x-ccordinate of the vertex lies at the point  x = -b/2a:

 

x = -b/2a

x = -2/2(4)

x = -2/8

x = -1/4

 

To find the y-coordinate of the vertex. plug x = 1/4 into your quadratic equation and compute the value of y.