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Casey Roach
Mathematics
26 November, 15:00
Factor this polynomial: x^2+12x+27
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Charles
26 November, 15:06
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Pairs of factors of 27 could be 1 and 27, 3 and 9, 9 and 3, and so on.
Do 1 and 27 add up to 12? No, so reject possible factors (x+1) (x+27).
Do 3 and 9 add up to 12? Yes. Thus, the correct factors are (x+3) (x+9).
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