Question

Factories
(i)
$121 {a}^{2} - 1$


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Answer 1

Answer:

121a²-1

= 121a²-1²

= (11a)² - (1)²

= (11a+1)(11a-1)

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Answer 2

$(11a ){}^{2} - (1) {}^{2} \\ (11a + 1)(11a - 1)$

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