Take rhs
(a+b)(a-b)
a2-ab+ba-b2
a2-0-b2
that is a2-b2
hence proved
since rhs =lhs or
lhs=rhs
karthika
am a person wit cool attitude and take life the way it comes.....i dont go dihearted for small things.......a cheerful extremely talented girl.........who any guy would wis.......am very beautiful.........cant express how beautiful i am.......