Question

5. 27a3+216b3 ???
tomorrow is the submission :(

Answer 1

(3a +6b) (9a² - 18ab + 36b²)

Explanation:

27 = 3 * 3 * 3 = 3³

216 = 6 * 6 * 6 = 6³

a³ + b³ = (a + b)(a² - ab + b²)

27a³ + 216b³ = (3a)³ + (6b)³

= (3a + 6b)( (3a)² - 3a*6b + (6b)² )

= (3a +6b) (9a² - 18ab + 36b²)