Finite Math Examples

$\frac{- 9 x^{5} + 3 x^{4} - 12}{3 x^{3}}$

Step 1

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

$3 x^{3}$

$0 x^{2}$

$0 x$

$0$

$9 x^{5}$

$3 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$12$

Step 2

Divide the highest order term in the dividend $- 9 x^{5}$ by the highest order term in divisor $3 x^{3}$ .

$3 x^{2}$

$3 x^{3}$

$0 x^{2}$

$0 x$

$0$

$9 x^{5}$

$3 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$12$

Step 3

Multiply the new quotient term by the divisor.

$3 x^{2}$

$3 x^{3}$

$0 x^{2}$

$0 x$

$0$

$9 x^{5}$

$3 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$12$

$9 x^{5}$

$0$

Step 4

The expression needs to be subtracted from the dividend, so change all the signs in $- 9 x^{5} + 0 + 0 + 0$

$3 x^{2}$

$3 x^{3}$

$0 x^{2}$

$0 x$

$0$

$9 x^{5}$

$3 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$12$

$9 x^{5}$

$0$

Step 5

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

$3 x^{2}$

$3 x^{3}$

$0 x^{2}$

$0 x$

$0$

$9 x^{5}$

$3 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$12$

$9 x^{5}$

$0$

$3 x^{4}$

$0$

Step 6

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

$3 x^{2}$

$3 x^{3}$

$0 x^{2}$

$0 x$

$0$

$9 x^{5}$

$3 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$12$

$9 x^{5}$

$0$

$3 x^{4}$

$0$

$0 x$

$12$

Step 7

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

$3 x^{2}$

$x$

$3 x^{3}$

$0 x^{2}$

$0 x$

$0$

$9 x^{5}$

$3 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$12$

$9 x^{5}$

$0$

$3 x^{4}$

$0$

$0 x$

$12$

Step 8

Multiply the new quotient term by the divisor.

$3 x^{2}$

$x$

$3 x^{3}$

$0 x^{2}$

$0 x$

$0$

$9 x^{5}$

$3 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$12$

$9 x^{5}$

$0$

$3 x^{4}$

$0$

$0 x$

$12$

$3 x^{4}$

$0$

Step 9

The expression needs to be subtracted from the dividend, so change all the signs in $3 x^{4} + 0 + 0 + 0$

							-	$3 x^{2}$	+	$x$
$3 x^{3}$	+	$0 x^{2}$	+	$0 x$	+	$0$	-	$9 x^{5}$	+	$3 x^{4}$	+	$0 x^{3}$	+	$0 x^{2}$	+	$0 x$	-	$12$
							+	$9 x^{5}$	-	$0$	-	$0$	-	$0$
									+	$3 x^{4}$	+	$0$	+	$0$	+	$0 x$	-	$12$
									-	$3 x^{4}$	-	$0$	-	$0$	-	$0$

Step 10

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

							-	$3 x^{2}$	+	$x$
$3 x^{3}$	+	$0 x^{2}$	+	$0 x$	+	$0$	-	$9 x^{5}$	+	$3 x^{4}$	+	$0 x^{3}$	+	$0 x^{2}$	+	$0 x$	-	$12$
							+	$9 x^{5}$	-	$0$	-	$0$	-	$0$
									+	$3 x^{4}$	+	$0$	+	$0$	+	$0 x$	-	$12$
									-	$3 x^{4}$	-	$0$	-	$0$	-	$0$
																$0$

Step 11

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

							-	$3 x^{2}$	+	$x$
$3 x^{3}$	+	$0 x^{2}$	+	$0 x$	+	$0$	-	$9 x^{5}$	+	$3 x^{4}$	+	$0 x^{3}$	+	$0 x^{2}$	+	$0 x$	-	$12$
							+	$9 x^{5}$	-	$0$	-	$0$	-	$0$
									+	$3 x^{4}$	+	$0$	+	$0$	+	$0 x$	-	$12$
									-	$3 x^{4}$	-	$0$	-	$0$	-	$0$
																$0$	-	$12$

Step 12

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

$- 3 x^{2} + x - \frac{12}{3 x^{3}}$