Simplify the following using identity
(2m+5n)²-(2m-5n)²
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Verified answer
By identity(a+b)^2 -(a-b)^2=4ab
a=2m ,b=5n
So answer
=40mn
→(4m^2+20mn+25n^2)–(4m^2–20mn+25n^2)
→4m^2+20mn+25n^2–4m^2+20mn-25n^2
→40mn is the Answer