High School

Complete the synthetic division problem below.

[tex]-1 \longdiv {2 \ 7 \ 5}[/tex]

What is the quotient in polynomial form?

A. [tex]x + 5[/tex]
B. [tex]2x + 5[/tex]
C. [tex]x - 5[/tex]
D. [tex]2x - 5[/tex]

Answer :

Sure! Let's go through the process of synthetic division step-by-step for the given problem.

We want to divide the polynomial [tex]\(2x + 7\)[/tex] by [tex]\(x + 1\)[/tex]. Here, synthetic division can be used since we are dividing by a linear polynomial.

### Step-by-Step Solution:

1. Identify the Coefficients:
- The polynomial we are dividing is [tex]\(2x + 7\)[/tex].
- The coefficients are 2 and 7.

2. Set Up for Synthetic Division:
- Since we are dividing by [tex]\(x + 1\)[/tex], we use the root, which is [tex]\(-1\)[/tex] for synthetic division.

3. Perform Synthetic Division:
- Write down the first coefficient (2), which is the leading coefficient of the dividend, as is under the division bar.
- Multiply this number by the root (-1) and add it to the next coefficient:
- Multiply: [tex]\(2 \times (-1) = -2\)[/tex].
- Add to the next coefficient: [tex]\(-2 + 7 = 5\)[/tex].

4. Form the Quotient:
- The numbers you have after synthetic division represent the coefficients of the quotient polynomial.
- The quotient we get is [tex]\(2x + 5\)[/tex].

Therefore, when you divide [tex]\(2x + 7\)[/tex] by [tex]\(x + 1\)[/tex], your quotient in polynomial form is [tex]\(\boxed{2x + 5}\)[/tex].

The correct choice from the options given is B. [tex]\(2x + 5\)[/tex].