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Verified answer
=3.4 x^2 - 2.18x - 15 + 0= 12x^2 - 36x - 15
Bab Turunan
f(x) = 4x³ - 18x² - 15x + 1
f'(x) = 3 . 4x³⁻¹ - 2 . 18x - 15
f'(x) = 12x² - 36x - 15