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Question

Factorise the following expression: l+m2-4lm


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Solution

Factorise the given expression:

The given expression is,

l+m2-4lm=l2+m2+2lm-4lm. a+b2=a2+b2+2ab

=l2+m2-2lm

=l-m2 a-b2=a2+b2-2ab

Hence, the factors are l-m and.l-m.


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