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2x + x

(x + x) + x

x + x + x = 3x

2x + x = 3x

* * * * *

No, no, no! The correct answer is:

x2 + x = x(x + 1).

It is sometimes best to test answers with various substitution values.

x2 + x = 3x, only when x = 0 or 2; but not otherwise.

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โˆ™ 2011-02-07 17:12:47
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Algebra

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Q: Is it possible to factor x2 plus x?
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