Answer:
12x³ + 23x² - 10x - 25
Explanation:
given
(4x + 5)(3x² + 2x - 5)
each term in the second factor is multiplied by each term in the first factor, that is
4x(3x² + 2x - 5) + 5(3x² + 2x - 5) ← distribute parenthesis
= 12x³ + 8x² - 20x + 15x² + 10x - 25 ← collect like terms
= 12x³ + 23x² - 10x - 25 ← in standard form