How do you factor x cubed plus 27 equals 0?

Answer 1

X^3 + 27 = 0

subtract 27 from both sides

X^3 = -27

take cubic root of both sides

X = -3 (this sentence is true for x = -3)

x3 + 27 = 0 the left side is the sum of the cubes, so it is factorable such as:

x3 + 33 = 0

(x + 3)(x2 - 3x + 9) = 0