Question

factorise it .49m^2 9n^2​

Answer 1

Answer:

$(7m-3n)(7m+3n)$

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Step-by-step explanation:

$49m^{2} -9n^{2}$

⇒ $(7m)^{2} -(3n)^{2}$

Using Formula : $a^{2} -b^{2} = (a-b)(a+b)$

⇒ $(7m-3n)(7m+3n)$