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

Question

Mathematics

Cheyenne Shah

11 November, 08:49

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

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Answers (2)

Know the Answer?

Brady Carter · Answer 1

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

Step-by-step explanation:

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

Andre Crawford · Answer 2

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.