To divide the polynomial \( x^3 - 17x + 32 \) by \( x + 5 \) using long division, follow these steps:
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Set up the long division:
- Divide \( x^3 \) by \( x \), which gives \( x^2 \).
- Multiply \( x^2 \) by \( x + 5 \) to get \( x^3 + 5x^2 \).
- Subtract this from the original polynomial:
\[ (x^3 - 17x + 32) - (x^3 + 5x^2) = -5x^2 - 17x + 32 \]
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Next, bring down the terms:
- Divide \( -5x^2 \) by \( x \), which gives \( -5x \).
- Multiply \( -5x \) by \( x + 5 \) to get \( -5x^2 - 25x \).
- Subtract this from the current polynomial:
\[ (-5x^2 - 17x + 32) - (-5x^2 - 25x) = 8x + 32 \]
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Next, continue with the division:
- Divide \( 8x \) by \( x \) to get \( 8 \).
- Multiply \( 8 \) by \( x + 5 \) to get \( 8x + 40 \).
- Subtract this from the current polynomial:
\[ (8x + 32) - (8x + 40) = -8 \]
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Now, we have our results:
The quotient is \( x^2 - 5x + 8 \) and the remainder is \(-8\).
This means:
\[ \frac{x^3 - 17x + 32}{x + 5} = x^2 - 5x + 8 - \frac{8}{x + 5} \]
Thus, the correct answer is B: \( x^2 - 5x + 8 - \frac{8}{x + 5} \).