Question

3x^4 - 243
Factoring

Answer 1

x = ±3

Explanation:

(3x² + 27)(x² - 9) = 0

(3x² + 27)(x + 3)(x - 3) = 0

3x² = -27

x² = -9

x = √-9 (this will result in an imaginary number)

x + 3 = 0

x = -3

x - 3 = 0

x = 3