Question

factorise the9a2 - 25​

Answer 1

Answer:

(3a)^2-(5)^2

=(3a+5)(3a-5)

This is ur answer mate

Answer 2

$9a ^{2} - 25 \\ (3a)^{2} - (5) ^{2} \\ (3a + 5) (3a - 5)$

Identity => a²-b²= (a+b)(a-b)