Algebra Examples

$(3 x^{4} - 3 x^{3} - 6 x - 10) \div (x - 2)$

Step 1

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

$x$

$2$

$3 x^{4}$

$3 x^{3}$

$0 x^{2}$

$6 x$

$10$

Step 2

Divide the highest order term in the dividend $3 x^{4}$ by the highest order term in divisor $x$ .

					$3 x^{3}$
	$x$	-	$2$		$3 x^{4}$	-	$3 x^{3}$	+	$0 x^{2}$	-	$6 x$	-	$10$

Step 3

Multiply the new quotient term by the divisor.

				$3 x^{3}$
$x$	-	$2$		$3 x^{4}$	-	$3 x^{3}$	+	$0 x^{2}$	-	$6 x$	-	$10$
			+	$3 x^{4}$	-	$6 x^{3}$

Step 4

The expression needs to be subtracted from the dividend, so change all the signs in $3 x^{4} - 6 x^{3}$

				$3 x^{3}$
$x$	-	$2$		$3 x^{4}$	-	$3 x^{3}$	+	$0 x^{2}$	-	$6 x$	-	$10$
			-	$3 x^{4}$	+	$6 x^{3}$

Step 5

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

$3 x^{3}$

$x$

$2$

$3 x^{4}$

$3 x^{3}$

$0 x^{2}$

$6 x$

$10$

$3 x^{4}$

$6 x^{3}$

$3 x^{3}$

Step 6

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

$3 x^{3}$

$x$

$2$

$3 x^{4}$

$3 x^{3}$

$0 x^{2}$

$6 x$

$10$

$3 x^{4}$

$6 x^{3}$

$3 x^{3}$

$0 x^{2}$

Step 7

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

$3 x^{3}$

$3 x^{2}$

$x$

$2$

$3 x^{4}$

$3 x^{3}$

$0 x^{2}$

$6 x$

$10$

$3 x^{4}$

$6 x^{3}$

$3 x^{3}$

$0 x^{2}$

Step 8

Multiply the new quotient term by the divisor.

$3 x^{3}$

$3 x^{2}$

$x$

$2$

$3 x^{4}$

$3 x^{3}$

$0 x^{2}$

$6 x$

$10$

$3 x^{4}$

$6 x^{3}$

$3 x^{3}$

$0 x^{2}$

$3 x^{3}$

$6 x^{2}$

Step 9

The expression needs to be subtracted from the dividend, so change all the signs in $3 x^{3} - 6 x^{2}$

$3 x^{3}$

$3 x^{2}$

$x$

$2$

$3 x^{4}$

$3 x^{3}$

$0 x^{2}$

$6 x$

$10$

$3 x^{4}$

$6 x^{3}$

$3 x^{3}$

$0 x^{2}$

$3 x^{3}$

$6 x^{2}$

Step 10

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

$3 x^{3}$

$3 x^{2}$

$x$

$2$

$3 x^{4}$

$3 x^{3}$

$0 x^{2}$

$6 x$

$10$

$3 x^{4}$

$6 x^{3}$

$3 x^{3}$

$0 x^{2}$

$3 x^{3}$

$6 x^{2}$

Step 11

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

$3 x^{3}$

$3 x^{2}$

$x$

$2$

$3 x^{4}$

$3 x^{3}$

$0 x^{2}$

$6 x$

$10$

$3 x^{4}$

$6 x^{3}$

$3 x^{3}$

$0 x^{2}$

$3 x^{3}$

$6 x^{2}$

$6 x$

Step 12

Divide the highest order term in the dividend $6 x^{2}$ by the highest order term in divisor $x$ .

$3 x^{3}$

$3 x^{2}$

$6 x$

$x$

$2$

$3 x^{4}$

$3 x^{3}$

$0 x^{2}$

$6 x$

$10$

$3 x^{4}$

$6 x^{3}$

$3 x^{3}$

$0 x^{2}$

$3 x^{3}$

$6 x^{2}$

$6 x$

Step 13

Multiply the new quotient term by the divisor.

$3 x^{3}$

$3 x^{2}$

$6 x$

$x$

$2$

$3 x^{4}$

$3 x^{3}$

$0 x^{2}$

$6 x$

$10$

$3 x^{4}$

$6 x^{3}$

$3 x^{3}$

$0 x^{2}$

$3 x^{3}$

$6 x^{2}$

$6 x$

$6 x^{2}$

$12 x$

Step 14

The expression needs to be subtracted from the dividend, so change all the signs in $6 x^{2} - 12 x$

$3 x^{3}$

$3 x^{2}$

$6 x$

$x$

$2$

$3 x^{4}$

$3 x^{3}$

$0 x^{2}$

$6 x$

$10$

$3 x^{4}$

$6 x^{3}$

$3 x^{3}$

$0 x^{2}$

$3 x^{3}$

$6 x^{2}$

$6 x$

$6 x^{2}$

$12 x$

Step 15

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

$3 x^{3}$

$3 x^{2}$

$6 x$

$x$

$2$

$3 x^{4}$

$3 x^{3}$

$0 x^{2}$

$6 x$

$10$

$3 x^{4}$

$6 x^{3}$

$3 x^{3}$

$0 x^{2}$

$3 x^{3}$

$6 x^{2}$

$6 x$

$6 x^{2}$

$12 x$

$6 x$

Step 16

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

$3 x^{3}$

$3 x^{2}$

$6 x$

$x$

$2$

$3 x^{4}$

$3 x^{3}$

$0 x^{2}$

$6 x$

$10$

$3 x^{4}$

$6 x^{3}$

$3 x^{3}$

$0 x^{2}$

$3 x^{3}$

$6 x^{2}$

$6 x$

$6 x^{2}$

$12 x$

$6 x$

$10$

Step 17

Divide the highest order term in the dividend $6 x$ by the highest order term in divisor $x$ .

$3 x^{3}$

$3 x^{2}$

$6 x$

$6$

$x$

$2$

$3 x^{4}$

$3 x^{3}$

$0 x^{2}$

$6 x$

$10$

$3 x^{4}$

$6 x^{3}$

$3 x^{3}$

$0 x^{2}$

$3 x^{3}$

$6 x^{2}$

$6 x$

$6 x^{2}$

$12 x$

$6 x$

$10$

Step 18

Multiply the new quotient term by the divisor.

$3 x^{3}$

$3 x^{2}$

$6 x$

$6$

$x$

$2$

$3 x^{4}$

$3 x^{3}$

$0 x^{2}$

$6 x$

$10$

$3 x^{4}$

$6 x^{3}$

$3 x^{3}$

$0 x^{2}$

$3 x^{3}$

$6 x^{2}$

$6 x$

$6 x^{2}$

$12 x$

$6 x$

$10$

$6 x$

$12$

Step 19

The expression needs to be subtracted from the dividend, so change all the signs in $6 x - 12$

$3 x^{3}$

$3 x^{2}$

$6 x$

$6$

$x$

$2$

$3 x^{4}$

$3 x^{3}$

$0 x^{2}$

$6 x$

$10$

$3 x^{4}$

$6 x^{3}$

$3 x^{3}$

$0 x^{2}$

$3 x^{3}$

$6 x^{2}$

$6 x$

$6 x^{2}$

$12 x$

$6 x$

$10$

$6 x$

$12$

Step 20

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

$3 x^{3}$

$3 x^{2}$

$6 x$

$6$

$x$

$2$

$3 x^{4}$

$3 x^{3}$

$0 x^{2}$

$6 x$

$10$

$3 x^{4}$

$6 x^{3}$

$3 x^{3}$

$0 x^{2}$

$3 x^{3}$

$6 x^{2}$

$6 x$

$6 x^{2}$

$12 x$

$6 x$

$10$

$6 x$

$12$

$2$

Step 21

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

$3 x^{3} + 3 x^{2} + 6 x + 6 + \frac{2}{x - 2}$