Divide Using Long Polynomial Division Use the long division method to find the result when x^3+12x^2+23x+6 is divided by x+2

Use the long division method to find the result when $x^{3} + 12 x^{2} + 23 x + 6$ is divided by $x + 2$

Step 1

Write the problem as a mathematical expression.

Use the long division method to find the result when $\frac{x^{3} + 12 x^{2} + 23 x + 6}{x + 2}$

Step 2

Set up the polynomials to be divided. If there is not a term for every exponent, insert one with a value of $0$ .

$x$

$2$

$x^{3}$

$12 x^{2}$

$23 x$

$6$

Step 3

Divide the highest order term in the dividend $x^{3}$ by the highest order term in divisor $x$ .

					$x^{2}$
	$x$	+	$2$		$x^{3}$	+	$12 x^{2}$	+	$23 x$	+	$6$

Step 4

Multiply the new quotient term by the divisor.

				$x^{2}$
$x$	+	$2$		$x^{3}$	+	$12 x^{2}$	+	$23 x$	+	$6$
			+	$x^{3}$	+	$2 x^{2}$

Step 5

The expression needs to be subtracted from the dividend, so change all the signs in $x^{3} + 2 x^{2}$

				$x^{2}$
$x$	+	$2$		$x^{3}$	+	$12 x^{2}$	+	$23 x$	+	$6$
			-	$x^{3}$	-	$2 x^{2}$

Step 6

After changing the signs, add the last dividend from the multiplied polynomial to find the new dividend.

				$x^{2}$
$x$	+	$2$		$x^{3}$	+	$12 x^{2}$	+	$23 x$	+	$6$
			-	$x^{3}$	-	$2 x^{2}$
					+	$10 x^{2}$

Step 7

Pull the next terms from the original dividend down into the current dividend.

				$x^{2}$
$x$	+	$2$		$x^{3}$	+	$12 x^{2}$	+	$23 x$	+	$6$
			-	$x^{3}$	-	$2 x^{2}$
					+	$10 x^{2}$	+	$23 x$

Step 8

Divide the highest order term in the dividend $10 x^{2}$ by the highest order term in divisor $x$ .

				$x^{2}$	+	$10 x$
$x$	+	$2$		$x^{3}$	+	$12 x^{2}$	+	$23 x$	+	$6$
			-	$x^{3}$	-	$2 x^{2}$
					+	$10 x^{2}$	+	$23 x$

Step 9

Multiply the new quotient term by the divisor.

				$x^{2}$	+	$10 x$
$x$	+	$2$		$x^{3}$	+	$12 x^{2}$	+	$23 x$	+	$6$
			-	$x^{3}$	-	$2 x^{2}$
					+	$10 x^{2}$	+	$23 x$
					+	$10 x^{2}$	+	$20 x$

Step 10

The expression needs to be subtracted from the dividend, so change all the signs in $10 x^{2} + 20 x$

				$x^{2}$	+	$10 x$
$x$	+	$2$		$x^{3}$	+	$12 x^{2}$	+	$23 x$	+	$6$
			-	$x^{3}$	-	$2 x^{2}$
					+	$10 x^{2}$	+	$23 x$
					-	$10 x^{2}$	-	$20 x$

Step 11

After changing the signs, add the last dividend from the multiplied polynomial to find the new dividend.

				$x^{2}$	+	$10 x$
$x$	+	$2$		$x^{3}$	+	$12 x^{2}$	+	$23 x$	+	$6$
			-	$x^{3}$	-	$2 x^{2}$
					+	$10 x^{2}$	+	$23 x$
					-	$10 x^{2}$	-	$20 x$
							+	$3 x$

Step 12

Pull the next terms from the original dividend down into the current dividend.

				$x^{2}$	+	$10 x$
$x$	+	$2$		$x^{3}$	+	$12 x^{2}$	+	$23 x$	+	$6$
			-	$x^{3}$	-	$2 x^{2}$
					+	$10 x^{2}$	+	$23 x$
					-	$10 x^{2}$	-	$20 x$
							+	$3 x$	+	$6$

Step 13

Divide the highest order term in the dividend $3 x$ by the highest order term in divisor $x$ .

				$x^{2}$	+	$10 x$	+	$3$
$x$	+	$2$		$x^{3}$	+	$12 x^{2}$	+	$23 x$	+	$6$
			-	$x^{3}$	-	$2 x^{2}$
					+	$10 x^{2}$	+	$23 x$
					-	$10 x^{2}$	-	$20 x$
							+	$3 x$	+	$6$

Step 14

Multiply the new quotient term by the divisor.

				$x^{2}$	+	$10 x$	+	$3$
$x$	+	$2$		$x^{3}$	+	$12 x^{2}$	+	$23 x$	+	$6$
			-	$x^{3}$	-	$2 x^{2}$
					+	$10 x^{2}$	+	$23 x$
					-	$10 x^{2}$	-	$20 x$
							+	$3 x$	+	$6$
							+	$3 x$	+	$6$

Step 15

The expression needs to be subtracted from the dividend, so change all the signs in $3 x + 6$

				$x^{2}$	+	$10 x$	+	$3$
$x$	+	$2$		$x^{3}$	+	$12 x^{2}$	+	$23 x$	+	$6$
			-	$x^{3}$	-	$2 x^{2}$
					+	$10 x^{2}$	+	$23 x$
					-	$10 x^{2}$	-	$20 x$
							+	$3 x$	+	$6$
							-	$3 x$	-	$6$

Step 16

After changing the signs, add the last dividend from the multiplied polynomial to find the new dividend.

				$x^{2}$	+	$10 x$	+	$3$
$x$	+	$2$		$x^{3}$	+	$12 x^{2}$	+	$23 x$	+	$6$
			-	$x^{3}$	-	$2 x^{2}$
					+	$10 x^{2}$	+	$23 x$
					-	$10 x^{2}$	-	$20 x$
							+	$3 x$	+	$6$
							-	$3 x$	-	$6$
										$0$

Step 17

Since the remander is $0$ , the final answer is the quotient.

$x^{2} + 10 x + 3$

Divide Using Long Polynomial Division Use the long division method to find the result when x^3+12x^2+23x+6 is divided by x+2

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