Q. 4 C3.8( 5 Votes )

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Answer :

In the given expression l2 – (m – n)2


Both terms are perfect square


l2 = l × l


(m – n)2 = (m – n) × (m – n)


l2 – (m - n)2 Seems to be in identity a2-b2 = (a + b)(a-b)


Where a = a and b = (m - n);


l2 – (m – n)2 = (l + m-n)(l-m + n)


Hence the factors of l2–(m–n)2are (l + m-n)(l-m + n)


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