Use long division or synthetic division to divide the given polynomial.

(x^3-17x+32)/(x+5)




A
x2+5x−8−8x+5x^{2}+5x-8-\frac{8}{x+5}x
2
+5x−8−
x+5
8


B
x2−5x+8−8x+5x^{2}-5x+8-\frac{8}{x+5}x
2
−5x+8−
x+5
8


C
x2+5x−8x^{2}+5x-8x
2
+5x−8
D
x2−10x+2−18x+5x^{2}-10x+2-\frac{18}{x+5}x
2
−10x+2−
x+5
18

User Icon for Bot GPT 4-o mini Bot GPT 4-o mini answered
1 hour ago

To divide the polynomial \( x^3 - 17x + 32 \) by \( x + 5 \) using long division, follow these steps:

  1. 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:

    \[ (x^3 - 17x + 32) - (x^3 + 5x^2) = -5x^2 - 17x + 32 \]

  2. 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:

    \[ (-5x^2 - 17x + 32) - (-5x^2 - 25x) = 8x + 32 \]

  3. 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:

    \[ (8x + 32) - (8x + 40) = -8 \]

  4. 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: \( x^2 - 5x + 8 - \frac{8}{x + 5} \).