Given that, #10; #10; ⇒x^2 81 #10; #10; ⇒x^2 9^2 #10; #10; ⇒( x 9 )( x+9 ) #10; #10; #10;Hence, this is the answer. #10; #1 ...

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Factorisation Using Algebraic Identities

Factorise x...

Question

Factorise $x^{2} - 81$

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Solution

Given that,

$\Rightarrow x^{2} - 81$

$\Rightarrow x^{2} - 9^{2}$

$\Rightarrow (x - 9) (x + 9)$

Hence, this is the answer.

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