Question
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Divide using synthetic division. \[ \left(4 x^{3}-2 x^{2}+5 x-2\right)+(x-1) \] \( \left(4 x^{3}-2 x^{2}+5 x-2\right)+(x-1)=\square \) (Simplify your answer. Do not factor.)

Ask by Marshall Rogers. in the United States
Mar 19,2025

Upstudy AI Solution

Tutor-Verified Answer

Answer

The simplified answer is \(4x^2 + 2x + 7 + \frac{5}{x-1}\).

Solution

1. Write the divisor in the form \(x-c\). The divisor is \(x-1\), so \(c=1\). 2. List the coefficients of the dividend \(4x^3-2x^2+5x-2\): - Coefficient of \(x^3\): 4 - Coefficient of \(x^2\): \(-2\) - Coefficient of \(x\): 5 - Constant term: \(-2\) 3. Set up synthetic division with \(c=1\): \[ \begin{array}{r|rrrr} 1 & 4 & -2 & 5 & -2 \\[6pt] & & 4 & 2 & 7 \\ \hline & 4 & 2 & 7 & 5 \\ \end{array} \] - Bring down the 4. - Multiply \(4 \times 1=4\) and add to \(-2\) to get \(2\). - Multiply \(2 \times 1=2\) and add to \(5\) to get \(7\). - Multiply \(7 \times 1=7\) and add to \(-2\) to get \(5\). 4. The bottom row shows the coefficients of the quotient and the remainder. The quotient is given by the first three numbers as: \[ 4x^2+2x+7 \] and the remainder is 5. 5. Write the result in division form: \[ \frac{4x^3-2x^2+5x-2}{x-1} = 4x^2+2x+7+\frac{5}{x-1}. \] Thus, the simplified answer is: \[ 4x^2+2x+7+\frac{5}{x-1}. \]

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Simplify this solution

Mind Expander

To solve this problem, we first need to simplify the expression \( (4 x^{3}-2 x^{2}+5 x-2) + (x-1) \). Combine like terms: \[ 4x^3 - 2x^2 + 5x - 2 + x - 1 = 4x^3 - 2x^2 + 6x - 3. \] Next, we can organize our synthetic division using the polynomial \( 4x^3 - 2x^2 + 6x - 3 \). We are dividing this polynomial by \( (x - 1) \), so we use 1 as our synthetic divisor: 1. Write the coefficients: 4, -2, 6, -3. 2. Bring down the 4. 3. Multiply 4 by 1 (the divisor) and add to -2, giving 2. 4. Multiply 2 by 1 and add to 6, giving 8. 5. Multiply 8 by 1 and add to -3, giving 5. The synthetic division gives us a quotient of \( 4x^2 + 2x + 8 \) with a remainder of 5. Therefore, we write the answer in the correct format: \[ (4 x^{3}-2 x^{2}+5 x-2) + (x-1) = 4x^2 + 2x + 8 + \frac{5}{(x-1)}. \]

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