SOLUTION: (9b+1)^2=

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Question 736559: (9b+1)^2=
Found 2 solutions by stanbon, Edwin McCravy:
Answer by stanbon(75887)   (Show Source): You can put this solution on YOUR website!
(9b+1)^2=
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= (9b+1)(9b+1)
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= 81b^2 + 9b + 9b + 1
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= 81b^2 + 18b + 1
====================
Cheers,
Stan H.
Answer by Edwin McCravy(20056)   (Show Source): You can put this solution on YOUR website!
Learn this rule:  (A + B)² = A² + 2AB + B²

In your problem

                  (9b + 1)²

comparing that with the above substitute 9b for A and 1 for B

                  (9b + 1)² = (9b)² + 2(9b)(1) + (1)²
                            = 81b² + 18b + 1

Edwin
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