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What is the quotient of the following division problem?

[tex]\[ \frac{x^2 + x}{x + 2} \][/tex]

A. [tex]\( x + 2 \)[/tex]
B. [tex]\( x + 1 \)[/tex]
C. [tex]\( x^2 + 3x + 2 \)[/tex]
D. [tex]\( 0 \)[/tex]


Sagot :

To find the quotient of the division problem [tex]\(\frac{x^2 + x}{x + 2}\)[/tex], we will perform polynomial long division. Here's a detailed, step-by-step solution:

1. Set up the division:
We are dividing [tex]\(x^2 + x\)[/tex] by [tex]\(x + 2\)[/tex].

2. Divide the leading term of the dividend by the leading term of the divisor:
[tex]\[ \frac{x^2}{x} = x \][/tex]
So, [tex]\(x\)[/tex] is the first term of our quotient.

3. Multiply the entire divisor by this first term of the quotient:
[tex]\[ x \cdot (x + 2) = x^2 + 2x \][/tex]

4. Subtract this result from the original polynomial:
[tex]\[ (x^2 + x) - (x^2 + 2x) = x^2 + x - x^2 - 2x = -x \][/tex]

5. Now, bring down any remaining term:
There are no more terms to bring down, so we proceed with the term [tex]\(-x\)[/tex].

6. Again, divide the leading term of the current polynomial by the leading term of the divisor:
[tex]\[ \frac{-x}{x} = -1 \][/tex]
So, [tex]\(-1\)[/tex] is the next term of our quotient.

7. Multiply the entire divisor by this next term of the quotient:
[tex]\[ -1 \cdot (x + 2) = -x - 2 \][/tex]

8. Subtract this result from the current polynomial:
[tex]\[ (-x) - (-x - 2) = -x + x + 2 = 2 \][/tex]

So, the division process is complete. The quotient is what we obtained in steps 2 and 6 combined:
[tex]\[ x - 1 \][/tex]

Thus, the quotient of the division problem [tex]\(\frac{x^2 + x}{x + 2}\)[/tex] is [tex]\(x - 1\)[/tex].