Question

The polynomial X3+ 8 is equal to

Answer 1

(x + 2)(x² - 2x + 4)

Explanation:

x³ + 8 ← is a sum of cubes and factors in general as

a³ + b³ = (a + b)(a² - ab + b²), thus

x³ + 8

= x³ + 2³

= (x + 2)(x² - 2x + 4)