tolong dong ya dikumpulkan besok....

f(x) = ax + b
f(-3) = - 3a + b = - 15
f(3) = 3a + b = 9
------------------------------(+)
2b = - 6
b = - 3
3a + b = 9
3a - 3 = 9
3a = 9 + 3
3a = 12
a = 4

f(x) = 4x - 3
f(-2) = 4(-2) - 3 = - 8 - 3 = - 11
f(2) = 4(2) - 3 = 8 - 3 = 5
f(-2) + f(2) = - 11 + 5 = - 6 (A)