Algebra Examples

$\frac{(- 99 x^{2} + 12 x^{4} - 81)}{(3 x + 9)}$

Step 1

Reorder $- 99 x^{2}$ and $12 x^{4}$ .

$\frac{12 x^{4} - 99 x^{2} - 81}{3 x + 9}$

Step 2

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

$3 x$

$9$

$12 x^{4}$

$0 x^{3}$

$99 x^{2}$

$0 x$

$81$

Step 3

Divide the highest order term in the dividend $12 x^{4}$ by the highest order term in divisor $3 x$ .

$4 x^{3}$

$3 x$

$9$

$12 x^{4}$

$0 x^{3}$

$99 x^{2}$

$0 x$

$81$

Step 4

Multiply the new quotient term by the divisor.

$4 x^{3}$

$3 x$

$9$

$12 x^{4}$

$0 x^{3}$

$99 x^{2}$

$0 x$

$81$

$12 x^{4}$

$36 x^{3}$

Step 5

The expression needs to be subtracted from the dividend, so change all the signs in $12 x^{4} + 36 x^{3}$

$4 x^{3}$

$3 x$

$9$

$12 x^{4}$

$0 x^{3}$

$99 x^{2}$

$0 x$

$81$

$12 x^{4}$

$36 x^{3}$

Step 6

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

$4 x^{3}$

$3 x$

$9$

$12 x^{4}$

$0 x^{3}$

$99 x^{2}$

$0 x$

$81$

$12 x^{4}$

$36 x^{3}$

Step 7

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

$4 x^{3}$

$3 x$

$9$

$12 x^{4}$

$0 x^{3}$

$99 x^{2}$

$0 x$

$81$

$12 x^{4}$

$36 x^{3}$

$99 x^{2}$

Step 8

Divide the highest order term in the dividend $- 36 x^{3}$ by the highest order term in divisor $3 x$ .

$4 x^{3}$

$12 x^{2}$

$3 x$

$9$

$12 x^{4}$

$0 x^{3}$

$99 x^{2}$

$0 x$

$81$

$12 x^{4}$

$36 x^{3}$

$99 x^{2}$

Step 9

Multiply the new quotient term by the divisor.

				$4 x^{3}$	-	$12 x^{2}$
$3 x$	+	$9$		$12 x^{4}$	+	$0 x^{3}$	-	$99 x^{2}$	+	$0 x$	-	$81$
			-	$12 x^{4}$	-	$36 x^{3}$
					-	$36 x^{3}$	-	$99 x^{2}$
					-	$36 x^{3}$	-	$108 x^{2}$

Step 10

The expression needs to be subtracted from the dividend, so change all the signs in $- 36 x^{3} - 108 x^{2}$

$4 x^{3}$

$12 x^{2}$

$3 x$

$9$

$12 x^{4}$

$0 x^{3}$

$99 x^{2}$

$0 x$

$81$

$12 x^{4}$

$36 x^{3}$

$99 x^{2}$

$36 x^{3}$

$108 x^{2}$

Step 11

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

$4 x^{3}$

$12 x^{2}$

$3 x$

$9$

$12 x^{4}$

$0 x^{3}$

$99 x^{2}$

$0 x$

$81$

$12 x^{4}$

$36 x^{3}$

$99 x^{2}$

$36 x^{3}$

$108 x^{2}$

$9 x^{2}$

Step 12

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

$4 x^{3}$

$12 x^{2}$

$3 x$

$9$

$12 x^{4}$

$0 x^{3}$

$99 x^{2}$

$0 x$

$81$

$12 x^{4}$

$36 x^{3}$

$99 x^{2}$

$36 x^{3}$

$108 x^{2}$

$9 x^{2}$

$0 x$

Step 13

Divide the highest order term in the dividend $9 x^{2}$ by the highest order term in divisor $3 x$ .

$4 x^{3}$

$12 x^{2}$

$3 x$

$9$

$12 x^{4}$

$0 x^{3}$

$99 x^{2}$

$0 x$

$81$

$12 x^{4}$

$36 x^{3}$

$99 x^{2}$

$36 x^{3}$

$108 x^{2}$

$9 x^{2}$

$0 x$

Step 14

Multiply the new quotient term by the divisor.

$4 x^{3}$

$12 x^{2}$

$3 x$

$9$

$12 x^{4}$

$0 x^{3}$

$99 x^{2}$

$0 x$

$81$

$12 x^{4}$

$36 x^{3}$

$99 x^{2}$

$36 x^{3}$

$108 x^{2}$

$9 x^{2}$

$0 x$

$9 x^{2}$

$27 x$

Step 15

The expression needs to be subtracted from the dividend, so change all the signs in $9 x^{2} + 27 x$

$4 x^{3}$

$12 x^{2}$

$3 x$

$9$

$12 x^{4}$

$0 x^{3}$

$99 x^{2}$

$0 x$

$81$

$12 x^{4}$

$36 x^{3}$

$99 x^{2}$

$36 x^{3}$

$108 x^{2}$

$9 x^{2}$

$0 x$

$9 x^{2}$

$27 x$

Step 16

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

$4 x^{3}$

$12 x^{2}$

$3 x$

$9$

$12 x^{4}$

$0 x^{3}$

$99 x^{2}$

$0 x$

$81$

$12 x^{4}$

$36 x^{3}$

$99 x^{2}$

$36 x^{3}$

$108 x^{2}$

$9 x^{2}$

$0 x$

$9 x^{2}$

$27 x$

Step 17

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

$4 x^{3}$

$12 x^{2}$

$3 x$

$9$

$12 x^{4}$

$0 x^{3}$

$99 x^{2}$

$0 x$

$81$

$12 x^{4}$

$36 x^{3}$

$99 x^{2}$

$36 x^{3}$

$108 x^{2}$

$9 x^{2}$

$0 x$

$9 x^{2}$

$27 x$

$81$

Step 18

Divide the highest order term in the dividend $- 27 x$ by the highest order term in divisor $3 x$ .

$4 x^{3}$

$12 x^{2}$

$3 x$

$9$

$3 x$

$9$

$12 x^{4}$

$0 x^{3}$

$99 x^{2}$

$0 x$

$81$

$12 x^{4}$

$36 x^{3}$

$99 x^{2}$

$36 x^{3}$

$108 x^{2}$

$9 x^{2}$

$0 x$

$9 x^{2}$

$27 x$

$81$

Step 19

Multiply the new quotient term by the divisor.

				$4 x^{3}$	-	$12 x^{2}$	+	$3 x$	-	$9$
$3 x$	+	$9$		$12 x^{4}$	+	$0 x^{3}$	-	$99 x^{2}$	+	$0 x$	-	$81$
			-	$12 x^{4}$	-	$36 x^{3}$
					-	$36 x^{3}$	-	$99 x^{2}$
					+	$36 x^{3}$	+	$108 x^{2}$
							+	$9 x^{2}$	+	$0 x$
							-	$9 x^{2}$	-	$27 x$
									-	$27 x$	-	$81$
									-	$27 x$	-	$81$

Step 20

The expression needs to be subtracted from the dividend, so change all the signs in $- 27 x - 81$

$4 x^{3}$

$12 x^{2}$

$3 x$

$9$

$3 x$

$9$

$12 x^{4}$

$0 x^{3}$

$99 x^{2}$

$0 x$

$81$

$12 x^{4}$

$36 x^{3}$

$99 x^{2}$

$36 x^{3}$

$108 x^{2}$

$9 x^{2}$

$0 x$

$9 x^{2}$

$27 x$

$81$

$27 x$

$81$

Step 21

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

$4 x^{3}$

$12 x^{2}$

$3 x$

$9$

$3 x$

$9$

$12 x^{4}$

$0 x^{3}$

$99 x^{2}$

$0 x$

$81$

$12 x^{4}$

$36 x^{3}$

$99 x^{2}$

$36 x^{3}$

$108 x^{2}$

$9 x^{2}$

$0 x$

$9 x^{2}$

$27 x$

$81$

$27 x$

$81$

$0$

Step 22

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

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