Answer:
(x-7) (x+4)
Step-by-step explanation:
x^2 - 3x - 28
What two numbers multiply to -28 and add to -3
-7*4 = -28
-7+4 = -3
on the top: -28
on the bottom: -3
on the sides: -7 and 4
(x-7)(x+4)
