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f(2) = -3 x2 +6 = -6+6 = 0
b.f(9) = -3 x 9 +6
-27+6 =-21
mungkin ya (:
f(x) = -3x + 6
f(-3) = -3.-3 + 6
= 9 + 6
= 15
f(x) = -3x + 6
f(2) = -3.2 + 6
= -6 + 6
= 0
(b)
f(x) = -3x + 6
f(a) = -9
f(a) => -3.a + 6 = 9
-3a + 6 = 9
-3a = 9 - 6
-3a = 3
a = -1