Matematika Sekolah Menengah Pertama tlng jawabbb yaaaaaaa​

tlng jawabbb yaaaaaaa​

Jawaban:

f(x) = 3x - 3a - 3

f(5) = -15

(3 × 5) - (3 ×a) - 3 = -15

15 - 3a - 3 = -15

-3a = -15 -15 +3

-3a = -27

a = -27 ÷ (-3)

a = 9

f(x) = 3x - (3×9) - 3

f(x) = 3x - 27 - 3

f(x) = 3x - 30

f(-1) = 3 × (-1) - 30 = -3 - 30 = -33

f(0) = 3×0 - 30 = 0 - 30 = -30

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