selesaikan persamaan eksponen berikut

7^(x³ - 3x² -10x - 2) = 1/49
7^(x³ - 3x² -10x - 2) = 1/7²
7^(x³ - 3x² -10x - 2) = 7^(-2)
⇔ x³ - 3x² -10x - 2 = -2
⇔ x³ - 3x² -10x = 0
⇔ x (x² -3x - 10) = 0
⇔ x (x + 3) (x - 5) = 0
x=0
x= - 3
x=5

HP: x={-3, 0, 5}