Question

Factorise the following expressions
(l+m) ²-4lm

Answer 1

here is your answer mate

(l+m)^2-4lm==>(a+b)^2=a^2+b^2+2ab

$(l ^{2} + {m }^{2} + 2lm ) - 4lm \\ \\ {l}^{2} + {m}^{2} + 2lm \\ \\ (l + m)^{2}$

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