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Use synthetic division to find the result when 3, x, cubed, plus, 2, x, squared, plus, 113x

3
+2x
2
+11 is divided by x, plus, 1x+1. If there is a remainder, express the result in the form q, left bracket, x, right bracket, plus, start fraction, r, left bracket, x, right bracket, divided by, b, left bracket, x, right bracket, end fractionq(x)+
b(x)
r(x)


1 Answer

4 votes

Answer:Therefore, the expression can be written as q(x) = 3x^2 - x + 1 + 123/(x - 1).

Step-by-step explanation:To use synthetic division, we will divide the polynomial 3x^3 + 2x^2 + 113x^3 + 2x^2 + 11 by the polynomial x + 1.

1. Write the coefficients of the polynomial in descending order: 3, 2, 113, 2, 11.

2. Write the divisor in the form (x + a), where a is the opposite of the constant term: x + (-1) = x - 1.

3. Set up the synthetic division table, with the coefficients of the polynomial as the first row and the divisor as the second row:

-1 | 3 2 113 2 11

4. Bring down the first coefficient (3) and multiply it by the divisor's constant term (-1). Write the result (3) in the next row:

-1 | 3 2 113 2 11

-3

5. Add the two numbers in the second row to get the next term (2 + (-3) = -1). Write it in the next row:

-1 | 3 2 113 2 11

-3 -1

6. Multiply the constant term of the divisor (-1) by the result in the second row (-1). Write the result (1) in the next row:

-1 | 3 2 113 2 11

-3 -1 1

7. Add the two numbers in the third row to get the next term (113 + 1 = 114). Write it in the next row:

-1 | 3 2 113 2 11

-3 -1 1 114

8. Repeat the process with the next term (2):

-1 | 3 2 113 2 11

-3 -1 1 114 112

9. Finally, add the two numbers in the last row to get the remainder (11 + 112 = 123):

-1 | 3 2 113 2 11

-3 -1 1 114 112

123

The result of the division is:

3x^2 - x + 1 with a remainder of 123.

Therefore, the expression can be written as q(x) = 3x^2 - x + 1 + 123/(x - 1).To use synthetic division, we will divide the polynomial 3x^3 + 2x^2 + 113x^3 + 2x^2 + 11 by the polynomial x + 1.

1. Write the coefficients of the polynomial in descending order: 3, 2, 113, 2, 11.

2. Write the divisor in the form (x + a), where a is the opposite of the constant term: x + (-1) = x - 1.

3. Set up the synthetic division table, with the coefficients of the polynomial as the first row and the divisor as the second row:

-1 | 3 2 113 2 11

4. Bring down the first coefficient (3) and multiply it by the divisor's constant term (-1). Write the result (3) in the next row:

-1 | 3 2 113 2 11

-3

5. Add the two numbers in the second row to get the next term (2 + (-3) = -1). Write it in the next row:

-1 | 3 2 113 2 11

-3 -1

6. Multiply the constant term of the divisor (-1) by the result in the second row (-1). Write the result (1) in the next row:

-1 | 3 2 113 2 11

-3 -1 1

7. Add the two numbers in the third row to get the next term (113 + 1 = 114). Write it in the next row:

-1 | 3 2 113 2 11

-3 -1 1 114

8. Repeat the process with the next term (2):

-1 | 3 2 113 2 11

-3 -1 1 114 112

9. Finally, add the two numbers in the last row to get the remainder (11 + 112 = 123):

-1 | 3 2 113 2 11

-3 -1 1 114 112

123

The result of the division is:

3x^2 - x + 1 with a remainder of 123.

Therefore, the expression can be written as q(x) = 3x^2 - x + 1 + 123/(x - 1).

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