Answer:
x = 7 and - 1
Step-by-step explanation:
f(x) = (x - 7) (x + 1)
x - 7 = 0
x - 7 + 7 = 0 + 7
x = 7
x + 1 = 0
x + 1 - 1 = 0 - 1
x = - 1
