Find the x-intercepts of the parabola with

vertex (4,-20) and y-intercept (0,-4).

Write your answer in this form: (x1,71), (X2,72).

If necessary, round to the nearest hundredth.

(8.47,0) (-0.47,0)

Step-by-step explanation:

y = a (x - h) ² + k

y = a (x - 4) ² - 20

-4 = a (0 - 4) ² - 20

16 = 16a

a = 1

y = (x - 4) ² - 20

x-intercepts: y = 0

(x - 4) ² = 20

x - 4 = + / - 4.47 ...

x = 4.47+4, - 4.47+4

x = 8.47, - 0.47