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Use synthetic division to simplify \( \frac{3x^4 + 9x^3 - 5x^2}{x - 1} \). Write your answer in the form \(...

Use synthetic division to simplify \( \frac{3x^4 + 9x^3 - 5x^2}{x - 1} \).
Write your answer in the form \( q(x) + \frac{r}{d(x)} \) where \( q(x) \) is a polynomial, \( r \) is an integer, and \( d(x) \) is a linear polynomial. Simplify any fractions.

Answer

Step 1: Set up synthetic division using the zero of the divisor, which is 1 for \( x - 1 \).

Step 2: Write the coefficients of the dividend: 3, 9, -5, 0, 0 (since there are missing terms, include 0 for \( x \) and the constant term).

Step 3: Perform synthetic division:

  1. Bring down the leading coefficient: 3.
  2. Multiply 3 by 1 (the zero of the divisor) and add to the next coefficient: 9 + 3 = 12.
  3. Multiply 12 by 1 and add to the next coefficient: -5 + 12 = 7.
  4. Multiply 7 by 1 and add to the next coefficient: 0 + 7 = 7.
  5. Multiply 7 by 1 and add to the next coefficient: 0 + 7 = 7.

Step 4: The quotient is \( 3x^3 + 12x^2 + 7x + 7 \) and the remainder is 7.

Final Answer: \( 3x^3 + 12x^2 + 7x + 7 + \frac{7}{x - 1} \).

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