Finite Math Examples

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

Step 1

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

$x$

$2$

$2 x^{3}$

$0 x^{2}$

$4 x$

$3$

Step 2

Divide the highest order term in the dividend $- 2 x^{3}$ by the highest order term in divisor $x$ .

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

Step 3

Multiply the new quotient term by the divisor.

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

Step 4

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

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

Step 5

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

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

Step 6

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

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

Step 7

Divide the highest order term in the dividend $- 4 x^{2}$ by the highest order term in divisor $x$ .

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

Step 8

Multiply the new quotient term by the divisor.

			-	$2 x^{2}$	-	$4 x$
$x$	-	$2$	-	$2 x^{3}$	+	$0 x^{2}$	-	$4 x$	-	$3$
			+	$2 x^{3}$	-	$4 x^{2}$
					-	$4 x^{2}$	-	$4 x$
					-	$4 x^{2}$	+	$8 x$

Step 9

The expression needs to be subtracted from the dividend, so change all the signs in $- 4 x^{2} + 8 x$

			-	$2 x^{2}$	-	$4 x$
$x$	-	$2$	-	$2 x^{3}$	+	$0 x^{2}$	-	$4 x$	-	$3$
			+	$2 x^{3}$	-	$4 x^{2}$
					-	$4 x^{2}$	-	$4 x$
					+	$4 x^{2}$	-	$8 x$

Step 10

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

			-	$2 x^{2}$	-	$4 x$
$x$	-	$2$	-	$2 x^{3}$	+	$0 x^{2}$	-	$4 x$	-	$3$
			+	$2 x^{3}$	-	$4 x^{2}$
					-	$4 x^{2}$	-	$4 x$
					+	$4 x^{2}$	-	$8 x$
							-	$12 x$

Step 11

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

			-	$2 x^{2}$	-	$4 x$
$x$	-	$2$	-	$2 x^{3}$	+	$0 x^{2}$	-	$4 x$	-	$3$
			+	$2 x^{3}$	-	$4 x^{2}$
					-	$4 x^{2}$	-	$4 x$
					+	$4 x^{2}$	-	$8 x$
							-	$12 x$	-	$3$

Step 12

Divide the highest order term in the dividend $- 12 x$ by the highest order term in divisor $x$ .

			-	$2 x^{2}$	-	$4 x$	-	$12$
$x$	-	$2$	-	$2 x^{3}$	+	$0 x^{2}$	-	$4 x$	-	$3$
			+	$2 x^{3}$	-	$4 x^{2}$
					-	$4 x^{2}$	-	$4 x$
					+	$4 x^{2}$	-	$8 x$
							-	$12 x$	-	$3$

Step 13

Multiply the new quotient term by the divisor.

			-	$2 x^{2}$	-	$4 x$	-	$12$
$x$	-	$2$	-	$2 x^{3}$	+	$0 x^{2}$	-	$4 x$	-	$3$
			+	$2 x^{3}$	-	$4 x^{2}$
					-	$4 x^{2}$	-	$4 x$
					+	$4 x^{2}$	-	$8 x$
							-	$12 x$	-	$3$
							-	$12 x$	+	$24$

Step 14

The expression needs to be subtracted from the dividend, so change all the signs in $- 12 x + 24$

			-	$2 x^{2}$	-	$4 x$	-	$12$
$x$	-	$2$	-	$2 x^{3}$	+	$0 x^{2}$	-	$4 x$	-	$3$
			+	$2 x^{3}$	-	$4 x^{2}$
					-	$4 x^{2}$	-	$4 x$
					+	$4 x^{2}$	-	$8 x$
							-	$12 x$	-	$3$
							+	$12 x$	-	$24$

Step 15

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

			-	$2 x^{2}$	-	$4 x$	-	$12$
$x$	-	$2$	-	$2 x^{3}$	+	$0 x^{2}$	-	$4 x$	-	$3$
			+	$2 x^{3}$	-	$4 x^{2}$
					-	$4 x^{2}$	-	$4 x$
					+	$4 x^{2}$	-	$8 x$
							-	$12 x$	-	$3$
							+	$12 x$	-	$24$
									-	$27$

Step 16

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

$- 2 x^{2} - 4 x - 12 - \frac{27}{x - 2}$