Which of the following polynomial can be factored by the guessing method? Give the factorization in these cases!
I can "factor by guessing" all but the third one:
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My guesses for integers with product -4 are: 1 and -4; -1 and 4; and 2 and -2. None of them have the required sum -5. -
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Helmut Knaust
Sat Jun 21 20:47:23 MDT 1997
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