SOLUTION: [(2x+1)-9][(2x+1)+9]

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Question 427008: [(2x+1)-9][(2x+1)+9]
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
[(2x+1)-9][(2x+1)+9]
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= (2x+1)^2-81
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= 4x^2+4x+1-81
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= 4x^2+4x-80
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Cheers,
Stan H.