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If after finding all the factors of the product of the highest term's coefficient and the linear term, none of the can add or subtract to give the middle term then it is not factorable.

x^2 +5x+6 is factorable. 1x6; 2x3

2+3=5 so it can be factored.

x^2+7x+6 is factorable but

x^2+8x+6 is NOT factorable because 1 and 6 as well as 2 and 3 can't add up to the middle term.

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โˆ™ 2013-08-29 03:56:20
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Q: What is an unfactorable polynomial?
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