Finite Math Examples

$\frac{x^{4} - 3 x^{3} - 18 x^{2} + 162 x - 324}{x^{2} - 6 x + 18}$

Step 1

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

$x^{2}$

$6 x$

$18$

$x^{4}$

$3 x^{3}$

$18 x^{2}$

$162 x$

$324$

Step 2

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

							$x^{2}$
	$x^{2}$	-	$6 x$	+	$18$		$x^{4}$	-	$3 x^{3}$	-	$18 x^{2}$	+	$162 x$	-	$324$

Step 3

Multiply the new quotient term by the divisor.

$x^{2}$

$6 x$

$18$

$x^{4}$

$3 x^{3}$

$18 x^{2}$

$162 x$

$324$

$x^{4}$

$6 x^{3}$

$18 x^{2}$

Step 4

The expression needs to be subtracted from the dividend, so change all the signs in $x^{4} - 6 x^{3} + 18 x^{2}$

$x^{2}$

$6 x$

$18$

$x^{4}$

$3 x^{3}$

$18 x^{2}$

$162 x$

$324$

$x^{4}$

$6 x^{3}$

$18 x^{2}$

Step 5

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

$x^{2}$

$6 x$

$18$

$x^{4}$

$3 x^{3}$

$18 x^{2}$

$162 x$

$324$

$x^{4}$

$6 x^{3}$

$18 x^{2}$

$3 x^{3}$

$36 x^{2}$

Step 6

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

$x^{2}$

$6 x$

$18$

$x^{4}$

$3 x^{3}$

$18 x^{2}$

$162 x$

$324$

$x^{4}$

$6 x^{3}$

$18 x^{2}$

$3 x^{3}$

$36 x^{2}$

$162 x$

Step 7

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

$x^{2}$

$3 x$

$x^{2}$

$6 x$

$18$

$x^{4}$

$3 x^{3}$

$18 x^{2}$

$162 x$

$324$

$x^{4}$

$6 x^{3}$

$18 x^{2}$

$3 x^{3}$

$36 x^{2}$

$162 x$

Step 8

Multiply the new quotient term by the divisor.

$x^{2}$

$3 x$

$x^{2}$

$6 x$

$18$

$x^{4}$

$3 x^{3}$

$18 x^{2}$

$162 x$

$324$

$x^{4}$

$6 x^{3}$

$18 x^{2}$

$3 x^{3}$

$36 x^{2}$

$162 x$

$3 x^{3}$

$18 x^{2}$

$54 x$

Step 9

The expression needs to be subtracted from the dividend, so change all the signs in $3 x^{3} - 18 x^{2} + 54 x$

$x^{2}$

$3 x$

$x^{2}$

$6 x$

$18$

$x^{4}$

$3 x^{3}$

$18 x^{2}$

$162 x$

$324$

$x^{4}$

$6 x^{3}$

$18 x^{2}$

$3 x^{3}$

$36 x^{2}$

$162 x$

$3 x^{3}$

$18 x^{2}$

$54 x$

Step 10

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

$x^{2}$

$3 x$

$x^{2}$

$6 x$

$18$

$x^{4}$

$3 x^{3}$

$18 x^{2}$

$162 x$

$324$

$x^{4}$

$6 x^{3}$

$18 x^{2}$

$3 x^{3}$

$36 x^{2}$

$162 x$

$3 x^{3}$

$18 x^{2}$

$54 x$

$18 x^{2}$

$108 x$

Step 11

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

$x^{2}$

$3 x$

$x^{2}$

$6 x$

$18$

$x^{4}$

$3 x^{3}$

$18 x^{2}$

$162 x$

$324$

$x^{4}$

$6 x^{3}$

$18 x^{2}$

$3 x^{3}$

$36 x^{2}$

$162 x$

$3 x^{3}$

$18 x^{2}$

$54 x$

$18 x^{2}$

$108 x$

$324$

Step 12

Divide the highest order term in the dividend $- 18 x^{2}$ by the highest order term in divisor $x^{2}$ .

$x^{2}$

$3 x$

$18$

$x^{2}$

$6 x$

$18$

$x^{4}$

$3 x^{3}$

$18 x^{2}$

$162 x$

$324$

$x^{4}$

$6 x^{3}$

$18 x^{2}$

$3 x^{3}$

$36 x^{2}$

$162 x$

$3 x^{3}$

$18 x^{2}$

$54 x$

$18 x^{2}$

$108 x$

$324$

Step 13

Multiply the new quotient term by the divisor.

$x^{2}$

$3 x$

$18$

$x^{2}$

$6 x$

$18$

$x^{4}$

$3 x^{3}$

$18 x^{2}$

$162 x$

$324$

$x^{4}$

$6 x^{3}$

$18 x^{2}$

$3 x^{3}$

$36 x^{2}$

$162 x$

$3 x^{3}$

$18 x^{2}$

$54 x$

$18 x^{2}$

$108 x$

$324$

$18 x^{2}$

$108 x$

$324$

Step 14

The expression needs to be subtracted from the dividend, so change all the signs in $- 18 x^{2} + 108 x - 324$

$x^{2}$

$3 x$

$18$

$x^{2}$

$6 x$

$18$

$x^{4}$

$3 x^{3}$

$18 x^{2}$

$162 x$

$324$

$x^{4}$

$6 x^{3}$

$18 x^{2}$

$3 x^{3}$

$36 x^{2}$

$162 x$

$3 x^{3}$

$18 x^{2}$

$54 x$

$18 x^{2}$

$108 x$

$324$

$18 x^{2}$

$108 x$

$324$

Step 15

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

$x^{2}$

$3 x$

$18$

$x^{2}$

$6 x$

$18$

$x^{4}$

$3 x^{3}$

$18 x^{2}$

$162 x$

$324$

$x^{4}$

$6 x^{3}$

$18 x^{2}$

$3 x^{3}$

$36 x^{2}$

$162 x$

$3 x^{3}$

$18 x^{2}$

$54 x$

$18 x^{2}$

$108 x$

$324$

$18 x^{2}$

$108 x$

$324$

$0$

Step 16

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

$x^{2} + 3 x - 18$