Question

☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺?

Answer 1

x+a is a factor therefore x+a =0

x= -a

f(-a) = a^2 - a - 6 = 0. (1)

g(-a) = a^2 - 3a - 18 = 0. (2)

subracting (1) from(2)

a^2 - 3a - 18 - a^2 + a + 6 = 0

- 2a - 12 = 0

a = - 6