SOLUTION: hi there this is my first time i got on to the site and i just like a break down on how (a+b)2 = a2 + 2ab + b2 . it would be a big help if you could tell why it is not a2 + b2 ps a

Question 279716: hi there this is my first time i got on to the site and i just like a break down on how (a+b)2 = a2 + 2ab + b2 . it would be a big help if you could tell why it is not a2 + b2 ps a2 means a to the power 2 thank you
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
hi there this is my first time i got on to the site and i just like a break down on how (a+b)2 = a2 + 2ab + b2 . it would be a big help if you could tell why it is not a2 + b2 ps a2 means a to the power 2 thank you
--------------

= a*(a+b) + b*(a+b)
=
=
-----------------------
It's easy to prove it's not a^2 + b^2
Let a = b = 1
a^2 + b^2 = 1 + 1 = 2
(a + b)^2 = 2^2 = 4
2 <> 4 QED

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