How to solve x^3 - 27

factoring x to the 3rd power minus 27
in Algebra 1 Answers by Level 1 User (120 points)

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2 Answers

x^3 - 27 is a perfect cube.

x^3 - 27 = 0

bring over -27 (change the sign)

x^3 = 27

then take the cubed root of 27

you get x = 3
by Level 1 User (260 points)
x^3 - 27
x^3 - 27 = 0
x^3 - 3^3 = 0
(x - 3)(x^2 + 3x + 3^2) = 0
x - 3 = 0 ⇒ x = 3
by Level 8 User (36.8k points)

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