Answer:
A polynomial function can be factored by its roots
f(x) = (x-a).(x-b). ... (x-r)
Which a, b, ... r are roots
In this case
f(x) = (x+12).(x-7)
But
f(x) = (x-(-12)).(x-7)
Thus roots are
-12 and 7
Distance is the abs function
abs(-12,7) = |-12 - 7| = 19
Ans: 19
Step-by-step explanation: