Answer:
f(x) = (x - 10) (x + 10)
Step-by-step explanation:
The equation looks like the difference of squares so 5 and 20 are out
-10 x -10 = 100
-10 x 10 = - 100
so (x - 10) (x + 10)
Answer:
-6
Step-by-step explanation:
imagine you're on a line graph you start at zero and then go backward 15 spaces and move forward 9 spaces where does that leave you