Question

(l+m)^2 - (l-m)^2 pls answer this

Answer 1

Answer:

(l+m)^2-(l-m)^2-2(l+m)(l-m)

l^2+m^2+2lm-l^2-m^2+2lm-2(l^2-m^2)

4lm-2l^2+2m^2

-2(l^2+m^2+2lm)

-2(l+m)^2

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Answer 2

Answer:

Step-by-step explanation:

(l+m)^2-(l-m)^2-2(l+m)(l-m)

l^2+m^2+2lm-l^2-m^2+2lm-2(l^2-m^2)

4lm-2l^2+2m^2

-2(l^2+m^2+2lm)

-2(l+m)^2

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BY Tolety Roshan