How Can 4(x + 1/2)^2 + 1 Be (2x + 1)^2 + 1?

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How ##4(x + \frac{1}{2})^2 + 1## can be ##(2x + 1)^2 + 1##?
 
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askor said:
How ##4(x + \frac{1}{2})^2 + 1## can be ##(2x + 1)^2 + 1##?
(2x + 1) = 2(x + 1/2), right?
 

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