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Mathematics, 04.03.2020 04:04 alexi25jeep
If x^3 - 5x - 4x + 20 is going to factor, then one of these combinations is going to “work”, that is, the polynomial will divide evenly and give f(k) = 0 according to the Factor Theorem. So the best thing to do is employ a little trail and error. Let’s start with the smaller numbers, they will be easier to evaluate.
1. Substitute for x: 1, -1, 2, -2, 4, -4 ...20, -20.
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If x^3 - 5x - 4x + 20 is going to factor, then one of these combinations is going to “work”, that is...
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