The correct option is A (7x+6)(7x 6) nbsp; 49x^2 36 =(7x)^2 (6)^2 Using, a^2 b^2=(a+b)(a b) =(7x+6)(7x 6) ...

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Expansion of (x^2 - y^2)

Factorise: 4...

Question

Factorise:
$49 x^{2} - 36$

(7 x + 6) (7 x - 6)

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(x - 6) (7 x - 6)

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(x + 6) (7 x - 6)

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(7 x - 6) (7 x - 6)

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Solution

The correct option is A $(7 x + 6) (7 x - 6)$
$49 x^{2} - 36$
$= (7 x)^{2} - (6)^{2}$
Using, $a^{2} - b^{2} = (a + b) (a - b)$
$= (7 x + 6) (7 x - 6)$

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