Find the x-intercept(s) and the coordinates of the vertex for the parabola y=x²+4x-12. If there is more than one x-intercept, separate them with commas

option 1

data plot with   3 dots over 33, 1 dot over 34, 2 dots over 35, no dot over 36, 1 dot over 37, 2 dots over 38, 4 dots over 39, and 2 dot over 40.

28

step-by-step explanation:

8+8+6+6

step-by-step :

there still no table