Answer Posted / ranganathappa c

consider a2-b2=(a+b)(a-b) ( a2 mean a square.)
put a=b, then
b2-b2=(b+b)(b-b)
b(b-b)=(b+b)(b-b) (take b common on LHS of the equation)
1b= 2b ( b-b) get cancled on both side
1=2 b also get cancled on both side.

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