diketahui f(x) = ax + b. jika f(1) = -4 dan f(3) = 2, nilai f(-2) + f(5) = .... tolong bantu ya kak

f(x) = ax + b

f(1) = - 4
a + b = -4
a = -4 - b

f(3) = 2
3a + b = 2
3(-4 - b) + b = 2
-12 -3b + b = 2
-2b = 14
b = -7

a = -4 - b
a = -4 -(-7) = 3

f(x) = 3x - 7

f(-2) + f(5)
= 3(-2) - 7 + 3(5) - 7
= - 6 - 7 + 15 - 7
= - 5