Tolg dijawab ya penting…

F'(x) = 6x² + 2x – 5

f(x)
= ∫ 6x² + 2x – 5
= 1 /(2 + 1). 6x²⁺¹ + 1 /(1 + 1). 2x¹⁺¹ – 5x + C
= 6/3 x³ + 2/2 x² – 5x + C
= 2x³ + x² – 5x + C

cari nilai c
f(x) = 2x³ + x² – 5x + C
f(-2) = 5
2(-2)³ + (-2)² – 5(-2) + C = 5
-16 + 4 + 10 + C = 5
-2 + C = 5
C = 5 + 2
C = 7

maka :
f(x) = 2x³ + x² – 5x + 7