Answer:
There fore, 96 x³+ 84 x² - 204x -45.
Explanation:
Given : (−8x − 15)(−12x² + 12x + 3) .
To find : Multiply.
Solution : We have given
(−8x − 15)(−12x² + 12x + 3)
Distributing -8x over (−12x² + 12x + 3) and 15 over (−12x² + 12x + 3) .
-8x (−12x² + 12x + 3) - 15 (−12x² + 12x + 3) .
96 x³ - 96x²- 24x + 180 x² - 180x - 45.
Combine like terms
96 x³ - 96x²+ 180 x² - 180x- 24x - 45.
96 x³+ 84 x² - 204x -45.
There fore, 96 x³+ 84 x² - 204x -45.