tolong jawab beserta cara no 6

(2x - 3)(x + 5)
= (2x . x) - (3 . x) + (2x . 5) - (3 . 5)
= 2x² - 3x + 10x - 15
= 2x² + 7x - 15

(2x -3)(x+5)
= 2x^2 + 10x - 3x - 15
= 2x^2 - 7x -15