Question

factorise the above question....​

Answer 1

Step-by-step explanation:

$9 - (a {}^{2} - 2ab + {b}^{2} ) \\ 9 - (a - b) {}^{2} \\ ({3})^{2} - ({a - b)}^{2}$

$3 + (a - b) \: 3 - (a - b) \\ (3 + a - b)(3 - a + b)$

Mark as brainest one.