Factorise the following-
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(3m-n)^2 -(m-2n)^2
Using a^2 -b^2=(a+b)(a-b)
{3m-n+(m-2n)} {3m-n-(m-2n)}
(3m-n+m-2n) (3m-n-m+2n)
(4m-3n) (2m+n)
Using a^2 -b^2=(a+b)(a-b)
{3m-n+(m-2n)} {3m-n-(m-2n)}
(3m-n+m-2n) (3m-n-m+2n)
(4m-3n) (2m+n)
Madhushri1:
Thank u so much! :)
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