Example

Finding the Quotient of Polynomial Functions (x25x14)÷(x+2)(x^2 - 5x - 14) \div (x + 2) and Evaluating at x=4x = -4

To find the quotient function and evaluate it for the functions f(x)=x25x14f(x) = x^2 - 5x - 14 and g(x)=x+2g(x) = x + 2, follow two steps: Step 1 — Find (f/g)(x)(f/g)(x). Apply the definition of division for polynomial functions: (f/g)(x)=f(x)g(x)(f/g)(x) = \frac{f(x)}{g(x)}. Substitute the given polynomials to form the rational expression x25x14x+2\frac{x^2 - 5x - 14}{x + 2}. Use polynomial division to divide the numerator by the denominator. Dividing x25x14x^2 - 5x - 14 by x+2x + 2 yields x7x - 7. Therefore, (f/g)(x)=x7(f/g)(x) = x - 7. Step 2 — Evaluate (f/g)(4)(f/g)(-4). Substitute the specific value 4-4 for xx in the resulting quotient function: (f/g)(4)=(4)7=11(f/g)(-4) = (-4) - 7 = -11.

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Updated 2026-04-29

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