Question 680507
 the given roots
-9 and -15
:
Find the two factors from the given roots:
x = -9
(x+9) = 0
and
x = -15
(x+15)
FOIL (x+9)(x+15) = x^2 + 15x + 9x + 135
which is 
P(x) = x^2 + 24x + 135