The problem is to determine the quotient and remainder when the polynomial $3x^3 - 5x^2 - 7x - 1$ is divided by the polynomial $x - 3$.

AlgebraPolynomial DivisionPolynomialsAlgebraic ManipulationRemainder Theorem
2025/3/19

1. Problem Description

The problem is to determine the quotient and remainder when the polynomial 3x35x27x13x^3 - 5x^2 - 7x - 1 is divided by the polynomial x3x - 3.

2. Solution Steps

We will use polynomial long division.
First, we divide 3x33x^3 by xx to get 3x23x^2. Then we multiply 3x23x^2 by (x3)(x-3) to get 3x39x23x^3 - 9x^2. Subtracting this from 3x35x23x^3 - 5x^2 gives (3x35x2)(3x39x2)=4x2(3x^3 - 5x^2) - (3x^3 - 9x^2) = 4x^2. Bring down the 7x-7x term to get 4x27x4x^2 - 7x.
Next, we divide 4x24x^2 by xx to get 4x4x. Then we multiply 4x4x by (x3)(x-3) to get 4x212x4x^2 - 12x. Subtracting this from 4x27x4x^2 - 7x gives (4x27x)(4x212x)=5x(4x^2 - 7x) - (4x^2 - 12x) = 5x. Bring down the 1-1 term to get 5x15x - 1.
Finally, we divide 5x5x by xx to get 55. Then we multiply 55 by (x3)(x-3) to get 5x155x - 15. Subtracting this from 5x15x - 1 gives (5x1)(5x15)=14(5x - 1) - (5x - 15) = 14.
The quotient is 3x2+4x+53x^2 + 4x + 5 and the remainder is 1414.
3x35x27x1=(x3)(3x2+4x+5)+143x^3 - 5x^2 - 7x - 1 = (x-3)(3x^2+4x+5)+14

3. Final Answer

The quotient is 3x2+4x+53x^2 + 4x + 5 and the remainder is 1414.

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