Finite Math Examples

$(p^{3} - 10 p^{2} + 20 p + 26) \div (p - 5)$

Step 1

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

$p$

$5$

$p^{3}$

$10 p^{2}$

$20 p$

$26$

Step 2

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

					$p^{2}$
	$p$	-	$5$		$p^{3}$	-	$10 p^{2}$	+	$20 p$	+	$26$

Step 3

Multiply the new quotient term by the divisor.

				$p^{2}$
$p$	-	$5$		$p^{3}$	-	$10 p^{2}$	+	$20 p$	+	$26$
			+	$p^{3}$	-	$5 p^{2}$

Step 4

The expression needs to be subtracted from the dividend, so change all the signs in $p^{3} - 5 p^{2}$

				$p^{2}$
$p$	-	$5$		$p^{3}$	-	$10 p^{2}$	+	$20 p$	+	$26$
			-	$p^{3}$	+	$5 p^{2}$

Step 5

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

				$p^{2}$
$p$	-	$5$		$p^{3}$	-	$10 p^{2}$	+	$20 p$	+	$26$
			-	$p^{3}$	+	$5 p^{2}$
					-	$5 p^{2}$

Step 6

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

				$p^{2}$
$p$	-	$5$		$p^{3}$	-	$10 p^{2}$	+	$20 p$	+	$26$
			-	$p^{3}$	+	$5 p^{2}$
					-	$5 p^{2}$	+	$20 p$

Step 7

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

				$p^{2}$	-	$5 p$
$p$	-	$5$		$p^{3}$	-	$10 p^{2}$	+	$20 p$	+	$26$
			-	$p^{3}$	+	$5 p^{2}$
					-	$5 p^{2}$	+	$20 p$

Step 8

Multiply the new quotient term by the divisor.

				$p^{2}$	-	$5 p$
$p$	-	$5$		$p^{3}$	-	$10 p^{2}$	+	$20 p$	+	$26$
			-	$p^{3}$	+	$5 p^{2}$
					-	$5 p^{2}$	+	$20 p$
					-	$5 p^{2}$	+	$25 p$

Step 9

The expression needs to be subtracted from the dividend, so change all the signs in $- 5 p^{2} + 25 p$

				$p^{2}$	-	$5 p$
$p$	-	$5$		$p^{3}$	-	$10 p^{2}$	+	$20 p$	+	$26$
			-	$p^{3}$	+	$5 p^{2}$
					-	$5 p^{2}$	+	$20 p$
					+	$5 p^{2}$	-	$25 p$

Step 10

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

				$p^{2}$	-	$5 p$
$p$	-	$5$		$p^{3}$	-	$10 p^{2}$	+	$20 p$	+	$26$
			-	$p^{3}$	+	$5 p^{2}$
					-	$5 p^{2}$	+	$20 p$
					+	$5 p^{2}$	-	$25 p$
							-	$5 p$

Step 11

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

				$p^{2}$	-	$5 p$
$p$	-	$5$		$p^{3}$	-	$10 p^{2}$	+	$20 p$	+	$26$
			-	$p^{3}$	+	$5 p^{2}$
					-	$5 p^{2}$	+	$20 p$
					+	$5 p^{2}$	-	$25 p$
							-	$5 p$	+	$26$

Step 12

Divide the highest order term in the dividend $- 5 p$ by the highest order term in divisor $p$ .

				$p^{2}$	-	$5 p$	-	$5$
$p$	-	$5$		$p^{3}$	-	$10 p^{2}$	+	$20 p$	+	$26$
			-	$p^{3}$	+	$5 p^{2}$
					-	$5 p^{2}$	+	$20 p$
					+	$5 p^{2}$	-	$25 p$
							-	$5 p$	+	$26$

Step 13

Multiply the new quotient term by the divisor.

				$p^{2}$	-	$5 p$	-	$5$
$p$	-	$5$		$p^{3}$	-	$10 p^{2}$	+	$20 p$	+	$26$
			-	$p^{3}$	+	$5 p^{2}$
					-	$5 p^{2}$	+	$20 p$
					+	$5 p^{2}$	-	$25 p$
							-	$5 p$	+	$26$
							-	$5 p$	+	$25$

Step 14

The expression needs to be subtracted from the dividend, so change all the signs in $- 5 p + 25$

				$p^{2}$	-	$5 p$	-	$5$
$p$	-	$5$		$p^{3}$	-	$10 p^{2}$	+	$20 p$	+	$26$
			-	$p^{3}$	+	$5 p^{2}$
					-	$5 p^{2}$	+	$20 p$
					+	$5 p^{2}$	-	$25 p$
							-	$5 p$	+	$26$
							+	$5 p$	-	$25$

Step 15

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

				$p^{2}$	-	$5 p$	-	$5$
$p$	-	$5$		$p^{3}$	-	$10 p^{2}$	+	$20 p$	+	$26$
			-	$p^{3}$	+	$5 p^{2}$
					-	$5 p^{2}$	+	$20 p$
					+	$5 p^{2}$	-	$25 p$
							-	$5 p$	+	$26$
							+	$5 p$	-	$25$
									+	$1$

Step 16

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

$p^{2} - 5 p - 5 + \frac{1}{p - 5}$