SOLUTION: Don't even know where to start with this: simplify [(3x+2)+5y][(3x+2)-5y]

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Question 721417: Don't even know where to start with this:
simplify [(3x+2)+5y][(3x+2)-5y]
Found 2 solutions by Alan3354, stanbon:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
simplify [(3x+2)+5y][(3x+2)-5y]
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It's the product of sum and difference.
%28a%2Bb%29%2A%28a-b%29+=+a%5E2+-+b%5E2
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[(3x+2)+5y][(3x+2)-5y] = %283x%2B2%29%5E2+-+%285y%29%5E2
You can expand that, or not.

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
simplify [(3x+2)+5y][(3x+2)-5y]
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= (3x+2)^2 - (5y)^2
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= 9x^2 + 12x + 4 - 25y^2
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Cheers,
Stan H.