Question

Factorise: 121-81m2



Plz right answer only​

Answer 1

$\bold{It~might~be~not~81m2.}$$\bold{Probably~it~is~81m²}$

$121 - 81 {m}^{2} \\ \\ {11}^{2} - {9m}^{2} \\ \\ Formula: \: {(a)}^{2} - {(b)}^{2} = (a + b)(a - b) \\ \\ a = 11, \: b = 9m \\ \\ (11 + 9m)(11 - 9m)$

$\bold{Hope,~u~got~it}$