Question

Factorise the following algebraic expression :-
$9 {x}^{2} - 121$
Give me steps:-
Right answer is :-
$(3x - 11)(3x + 11)$

Answer 1

$\huge {\bold {\red {Solution}}}$

$9 {x}^{2} - 121$

${(3x)}^{2} - {(11)}^{2}$

=(3x+11)(3x-11)

___________Formula used ___________

${a}^{2} +{b}^{2}$

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