Question

please answer this question very fast. No. 3 ka answer do ​

Answer 1

Answer:

(l+m)^2= (l-m)^2+4lm

(a+b)^2=a^2+b^2+2ab

so..

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

here every thing gets cancelled

hope this will help u... thanks

Answer 2

Step-by-step explanation:

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