Question

factorise
$25m {}^{2} n {}^{2} - 9p {}^{2} {r}^{2}$
​

Answer 1

Answer:

$25 {m}^{2} {n}^{2} - 9 {p}^{2} {r}^{2} \\ {(5mn)}^{2} - {(3pr)}^{2} \\ (5mn - 3pr)(5mn + 3pr)$

by (a-b)(a+b).

HERE IS YOUR ANSWER.

HOPE ITS HELPS.