Question

What formula should be used when factoring the expression x3+27

Answer 1

Answer: Rewrite 27 as 33 . Since both terms are perfect cubes, factor using the difference of cubes formula, a3−b3=(a−b)(a2+ab+b2) a 3 - b 3 = ( a - b ) ( a 2 + a b + b 2 ) where a=x and b=3 .

Explanation:

Answer 2

a^3+b^3=(a+b)(a^2-ab+b^2)

Explanation:

x^3+27=(x+3)(x^2-3x+9)