Question

factorise 27x² - 108​

Answer 1

Answer:

27(x^2-4)

27(x^2-2^2)

27(x+2) (x-2)

Answer 2

$27 {x}^{2} - 108 \\ \\ = 3(9 {x}^{2} - 36) \\ \\ = 3 [ ({3x)}^{2} - ( {6)}^{2} ]\\ \\ = 3(3x + 6)(3x - 6)$

This is the required answer.