Question

Factorize
a) (x² - 4x + 4) - 81​

Answer 1

Step-by-step explanation:

$({x}^{2} - 2(2)(x) + {2}^{2} ) - {9}^{2} \\ {(x - 2)}^{2} -{(9)}^{2} \\ using \: {x}^{2} - {y}^{2} = (x + y)(x - y) \\ (x - 2 + 9)(x - 2 - 9)$