Math Problem Statement

Use synthetic division to divide x^4 - 3x^3 + 2x^2 + 4x + 4 by x - 2. The quotient is ___, and the remainder is ___.

Solution

To solve this problem using synthetic division, let’s go through the steps in detail.

Given Polynomial

The polynomial is: x43x3+2x2+4x+4x^4 - 3x^3 + 2x^2 + 4x + 4 and we need to divide it by x2x - 2.

Synthetic Division Setup

  1. Write down the coefficients of the polynomial: 1,3,2,4,41, -3, 2, 4, 4.
  2. Since we are dividing by x2x - 2, the value we'll use in synthetic division is 22.

Synthetic Division Steps

  1. Bring down the first coefficient (1).
  2. Multiply 22 by the current result, then add it to the next coefficient.

Let’s go through each step:

StepCoefficientsResult
Initial1,3,2,4,41, -3, 2, 4, 4
Bring down11
Multiply & Add2×1=22 \times 1 = 2, then 3+2=1-3 + 2 = -1
Multiply & Add2×1=22 \times -1 = -2, then 2+(2)=02 + (-2) = 0
Multiply & Add2×0=02 \times 0 = 0, then 4+0=44 + 0 = 4
Multiply & Add2×4=82 \times 4 = 8, then 4+8=124 + 8 = 12

Final Row (Quotient and Remainder)

The bottom row gives us the coefficients of the quotient and the remainder: 1,1,0,4with remainder 121, -1, 0, 4 \quad \text{with remainder } 12

Answer

  • Quotient: x3x2+4x^3 - x^2 + 4
  • Remainder: 1212

So, the answer is: Quotient is x3x2+4, and the remainder is 12.\text{Quotient is } x^3 - x^2 + 4, \text{ and the remainder is } 12.

Would you like more details on each synthetic division step or have any questions?


Related Questions

  1. How do you use synthetic division for polynomials of lower degrees?
  2. What is the relationship between the remainder in synthetic division and the Remainder Theorem?
  3. Can synthetic division be used to divide by other terms, like x+3x + 3?
  4. How can synthetic division help identify factors of a polynomial?
  5. How would the result change if we divided by x+2x + 2 instead of x2x - 2?

Tip

Synthetic division is only applicable when dividing by linear divisors of the form xcx - c.

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Math Problem Analysis

Mathematical Concepts

Algebra
Polynomials
Synthetic Division

Formulas

Synthetic division algorithm

Theorems

Remainder Theorem

Suitable Grade Level

Grades 10-12