\frac{5x^4 - 17x^3 - 18x^2 + 19x + 20}{x - 4}
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(5x^4) / (x) = 5x^3 Multiply 5x^3 by (x-4) to get 5x^3 * x = 5x^4 and 5x^3 * -4 = -20x^3. Subtract these results from the original numerator: (5x^4 - 20x^3) - (5x^4 - 17x^3 - 18x^2 + 19x + 20) = -3x^3 - 18x^2 + 19x + 20 Show more…
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