What are the x-intercepts of the parabola x2 - 3x - 28?

The x intercetps are when the function hits the x axis or when y=0 or when the funciton equals zero

0=x^2-3x-28

solve

factor

wat multipliest o - 28 and adds to - 3?

-7 and 4

0 = (x-7) (x+4)

0=x-7

7=x

0=x+4

-4=x

the x intercetps are at x=-4 and x=7 or (-4,0) and (7,0)