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- f(2) = 2a + b = 6
f(-3) = -3a + b = 31 (eliminasi)
5a = 25
a = 25/5
a = 5
- 2a + b = 6
2(5) + b = 6
10 + b = 6
b = -4
- f(-2) x f(6)
rumus : f(x) = 5x - 4
>f(-2) = 5(-2) - 4
-10 - 4 = -14
>f(6) = 5(6) - 4
30 - 4 = 26
-14 x 26 = 364