Algebra Examples

$(x^{4} - x^{3} + 3 x^{2} - 6 x - 6) \div (x - 2)$

Step 1

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

$x$

$2$

$x^{4}$

$x^{3}$

$3 x^{2}$

$6 x$

$6$

Step 2

Divide the highest order term in the dividend $x^{4}$ by the highest order term in divisor $x$ .

					$x^{3}$
	$x$	-	$2$		$x^{4}$	-	$x^{3}$	+	$3 x^{2}$	-	$6 x$	-	$6$

Step 3

Multiply the new quotient term by the divisor.

				$x^{3}$
$x$	-	$2$		$x^{4}$	-	$x^{3}$	+	$3 x^{2}$	-	$6 x$	-	$6$
			+	$x^{4}$	-	$2 x^{3}$

Step 4

The expression needs to be subtracted from the dividend, so change all the signs in $x^{4} - 2 x^{3}$

				$x^{3}$
$x$	-	$2$		$x^{4}$	-	$x^{3}$	+	$3 x^{2}$	-	$6 x$	-	$6$
			-	$x^{4}$	+	$2 x^{3}$

Step 5

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

$x^{3}$

$x$

$2$

$x^{4}$

$x^{3}$

$3 x^{2}$

$6 x$

$6$

$x^{4}$

$2 x^{3}$

$x^{3}$

Step 6

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

$x^{3}$

$x$

$2$

$x^{4}$

$x^{3}$

$3 x^{2}$

$6 x$

$6$

$x^{4}$

$2 x^{3}$

$x^{3}$

$3 x^{2}$

Step 7

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

$x^{3}$

$x^{2}$

$x$

$2$

$x^{4}$

$x^{3}$

$3 x^{2}$

$6 x$

$6$

$x^{4}$

$2 x^{3}$

$x^{3}$

$3 x^{2}$

Step 8

Multiply the new quotient term by the divisor.

$x^{3}$

$x^{2}$

$x$

$2$

$x^{4}$

$x^{3}$

$3 x^{2}$

$6 x$

$6$

$x^{4}$

$2 x^{3}$

$x^{3}$

$3 x^{2}$

$x^{3}$

$2 x^{2}$

Step 9

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

$x^{3}$

$x^{2}$

$x$

$2$

$x^{4}$

$x^{3}$

$3 x^{2}$

$6 x$

$6$

$x^{4}$

$2 x^{3}$

$x^{3}$

$3 x^{2}$

$x^{3}$

$2 x^{2}$

Step 10

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

$x^{3}$

$x^{2}$

$x$

$2$

$x^{4}$

$x^{3}$

$3 x^{2}$

$6 x$

$6$

$x^{4}$

$2 x^{3}$

$x^{3}$

$3 x^{2}$

$x^{3}$

$2 x^{2}$

$5 x^{2}$

Step 11

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

$x^{3}$

$x^{2}$

$x$

$2$

$x^{4}$

$x^{3}$

$3 x^{2}$

$6 x$

$6$

$x^{4}$

$2 x^{3}$

$x^{3}$

$3 x^{2}$

$x^{3}$

$2 x^{2}$

$5 x^{2}$

$6 x$

Step 12

Divide the highest order term in the dividend $5 x^{2}$ by the highest order term in divisor $x$ .

$x^{3}$

$x^{2}$

$5 x$

$x$

$2$

$x^{4}$

$x^{3}$

$3 x^{2}$

$6 x$

$6$

$x^{4}$

$2 x^{3}$

$x^{3}$

$3 x^{2}$

$x^{3}$

$2 x^{2}$

$5 x^{2}$

$6 x$

Step 13

Multiply the new quotient term by the divisor.

$x^{3}$

$x^{2}$

$5 x$

$x$

$2$

$x^{4}$

$x^{3}$

$3 x^{2}$

$6 x$

$6$

$x^{4}$

$2 x^{3}$

$x^{3}$

$3 x^{2}$

$x^{3}$

$2 x^{2}$

$5 x^{2}$

$6 x$

$5 x^{2}$

$10 x$

Step 14

The expression needs to be subtracted from the dividend, so change all the signs in $5 x^{2} - 10 x$

$x^{3}$

$x^{2}$

$5 x$

$x$

$2$

$x^{4}$

$x^{3}$

$3 x^{2}$

$6 x$

$6$

$x^{4}$

$2 x^{3}$

$x^{3}$

$3 x^{2}$

$x^{3}$

$2 x^{2}$

$5 x^{2}$

$6 x$

$5 x^{2}$

$10 x$

Step 15

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

$x^{3}$

$x^{2}$

$5 x$

$x$

$2$

$x^{4}$

$x^{3}$

$3 x^{2}$

$6 x$

$6$

$x^{4}$

$2 x^{3}$

$x^{3}$

$3 x^{2}$

$x^{3}$

$2 x^{2}$

$5 x^{2}$

$6 x$

$5 x^{2}$

$10 x$

$4 x$

Step 16

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

$x^{3}$

$x^{2}$

$5 x$

$x$

$2$

$x^{4}$

$x^{3}$

$3 x^{2}$

$6 x$

$6$

$x^{4}$

$2 x^{3}$

$x^{3}$

$3 x^{2}$

$x^{3}$

$2 x^{2}$

$5 x^{2}$

$6 x$

$5 x^{2}$

$10 x$

$4 x$

$6$

Step 17

Divide the highest order term in the dividend $4 x$ by the highest order term in divisor $x$ .

$x^{3}$

$x^{2}$

$5 x$

$4$

$x$

$2$

$x^{4}$

$x^{3}$

$3 x^{2}$

$6 x$

$6$

$x^{4}$

$2 x^{3}$

$x^{3}$

$3 x^{2}$

$x^{3}$

$2 x^{2}$

$5 x^{2}$

$6 x$

$5 x^{2}$

$10 x$

$4 x$

$6$

Step 18

Multiply the new quotient term by the divisor.

$x^{3}$

$x^{2}$

$5 x$

$4$

$x$

$2$

$x^{4}$

$x^{3}$

$3 x^{2}$

$6 x$

$6$

$x^{4}$

$2 x^{3}$

$x^{3}$

$3 x^{2}$

$x^{3}$

$2 x^{2}$

$5 x^{2}$

$6 x$

$5 x^{2}$

$10 x$

$4 x$

$6$

$4 x$

$8$

Step 19

The expression needs to be subtracted from the dividend, so change all the signs in $4 x - 8$

$x^{3}$

$x^{2}$

$5 x$

$4$

$x$

$2$

$x^{4}$

$x^{3}$

$3 x^{2}$

$6 x$

$6$

$x^{4}$

$2 x^{3}$

$x^{3}$

$3 x^{2}$

$x^{3}$

$2 x^{2}$

$5 x^{2}$

$6 x$

$5 x^{2}$

$10 x$

$4 x$

$6$

$4 x$

$8$

Step 20

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

$x^{3}$

$x^{2}$

$5 x$

$4$

$x$

$2$

$x^{4}$

$x^{3}$

$3 x^{2}$

$6 x$

$6$

$x^{4}$

$2 x^{3}$

$x^{3}$

$3 x^{2}$

$x^{3}$

$2 x^{2}$

$5 x^{2}$

$6 x$

$5 x^{2}$

$10 x$

$4 x$

$6$

$4 x$

$8$

$2$

Step 21

The final answer is the quotient plus the remainder over the divisor.

$x^{3} + x^{2} + 5 x + 4 + \frac{2}{x - 2}$