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f(-2) = -2a +b = 11 _
8a = -24
a = -3
6a + b = -13
6(-3) + b = -13
b = -13 + 18
b = 5
maka f(-5) = (-3)(-5) + 5
= 15 + 5
= 20
f(-2)= -2a + b = 11 (kali 3)
6a + b = -13
-6a + 3b = 33 +
4b = 20
b = 5
6a + b = -13
6a + 5 = -13
6a = -18
a = -3
f(5) = 5a + b
= 5x(-3) + 5
= -15 + 5
= -10