Pre-Algebra Examples

$\frac{x^{5} - 2 x^{4}}{x^{2} + 7 x - 18 x}$

Step 1

Subtract $18 x$ from $7 x$ .

$\frac{x^{5} - 2 x^{4}}{x^{2} - 11 x}$

Step 2

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

$x^{2}$

$11 x$

$0$

$x^{5}$

$2 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

Step 3

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

$x^{3}$

$x^{2}$

$11 x$

$0$

$x^{5}$

$2 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

Step 4

Multiply the new quotient term by the divisor.

$x^{3}$

$x^{2}$

$11 x$

$0$

$x^{5}$

$2 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$x^{5}$

$11 x^{4}$

$0$

Step 5

The expression needs to be subtracted from the dividend, so change all the signs in $x^{5} - 11 x^{4} + 0$

$x^{3}$

$x^{2}$

$11 x$

$0$

$x^{5}$

$2 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$x^{5}$

$11 x^{4}$

$0$

Step 6

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

$x^{3}$

$x^{2}$

$11 x$

$0$

$x^{5}$

$2 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$x^{5}$

$11 x^{4}$

$0$

$9 x^{4}$

$0$

Step 7

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

$x^{3}$

$x^{2}$

$11 x$

$0$

$x^{5}$

$2 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$x^{5}$

$11 x^{4}$

$0$

$9 x^{4}$

$0$

$0 x^{2}$

$0 x$

Step 8

Divide the highest order term in the dividend $9 x^{4}$ by the highest order term in divisor $x^{2}$ .

$x^{3}$

$9 x^{2}$

$x^{2}$

$11 x$

$0$

$x^{5}$

$2 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$x^{5}$

$11 x^{4}$

$0$

$9 x^{4}$

$0$

$0 x^{2}$

$0 x$

Step 9

Multiply the new quotient term by the divisor.

$x^{3}$

$9 x^{2}$

$x^{2}$

$11 x$

$0$

$x^{5}$

$2 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$x^{5}$

$11 x^{4}$

$0$

$9 x^{4}$

$0$

$0 x^{2}$

$0 x$

$9 x^{4}$

$99 x^{3}$

$0$

Step 10

The expression needs to be subtracted from the dividend, so change all the signs in $9 x^{4} - 99 x^{3} + 0$

$x^{3}$

$9 x^{2}$

$x^{2}$

$11 x$

$0$

$x^{5}$

$2 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$x^{5}$

$11 x^{4}$

$0$

$9 x^{4}$

$0$

$0 x^{2}$

$0 x$

$9 x^{4}$

$99 x^{3}$

$0$

Step 11

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

$x^{3}$

$9 x^{2}$

$x^{2}$

$11 x$

$0$

$x^{5}$

$2 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$x^{5}$

$11 x^{4}$

$0$

$9 x^{4}$

$0$

$0 x^{2}$

$0 x$

$9 x^{4}$

$99 x^{3}$

$0$

$99 x^{3}$

$0$

Step 12

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

$x^{3}$

$9 x^{2}$

$x^{2}$

$11 x$

$0$

$x^{5}$

$2 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$x^{5}$

$11 x^{4}$

$0$

$9 x^{4}$

$0$

$0 x^{2}$

$0 x$

$9 x^{4}$

$99 x^{3}$

$0$

$99 x^{3}$

$0$

$0 x$

$0$

Step 13

Divide the highest order term in the dividend $99 x^{3}$ by the highest order term in divisor $x^{2}$ .

$x^{3}$

$9 x^{2}$

$99 x$

$x^{2}$

$11 x$

$0$

$x^{5}$

$2 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$x^{5}$

$11 x^{4}$

$0$

$9 x^{4}$

$0$

$0 x^{2}$

$0 x$

$9 x^{4}$

$99 x^{3}$

$0$

$99 x^{3}$

$0$

$0 x$

$0$

Step 14

Multiply the new quotient term by the divisor.

$x^{3}$

$9 x^{2}$

$99 x$

$x^{2}$

$11 x$

$0$

$x^{5}$

$2 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$x^{5}$

$11 x^{4}$

$0$

$9 x^{4}$

$0$

$0 x^{2}$

$0 x$

$9 x^{4}$

$99 x^{3}$

$0$

$99 x^{3}$

$0$

$0 x$

$0$

$99 x^{3}$

$1089 x^{2}$

$0$

Step 15

The expression needs to be subtracted from the dividend, so change all the signs in $99 x^{3} - 1089 x^{2} + 0$

$x^{3}$

$9 x^{2}$

$99 x$

$x^{2}$

$11 x$

$0$

$x^{5}$

$2 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$x^{5}$

$11 x^{4}$

$0$

$9 x^{4}$

$0$

$0 x^{2}$

$0 x$

$9 x^{4}$

$99 x^{3}$

$0$

$99 x^{3}$

$0$

$0 x$

$0$

$99 x^{3}$

$1089 x^{2}$

$0$

Step 16

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

$x^{3}$

$9 x^{2}$

$99 x$

$x^{2}$

$11 x$

$0$

$x^{5}$

$2 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$x^{5}$

$11 x^{4}$

$0$

$9 x^{4}$

$0$

$0 x^{2}$

$0 x$

$9 x^{4}$

$99 x^{3}$

$0$

$99 x^{3}$

$0$

$0 x$

$0$

$99 x^{3}$

$1089 x^{2}$

$0$

$1089 x^{2}$

$0$

Step 17

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

$x^{3}$

$9 x^{2}$

$99 x$

$x^{2}$

$11 x$

$0$

$x^{5}$

$2 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$x^{5}$

$11 x^{4}$

$0$

$9 x^{4}$

$0$

$0 x^{2}$

$0 x$

$9 x^{4}$

$99 x^{3}$

$0$

$99 x^{3}$

$0$

$0 x$

$0$

$99 x^{3}$

$1089 x^{2}$

$0$

$1089 x^{2}$

$0$

Step 18

Divide the highest order term in the dividend $1089 x^{2}$ by the highest order term in divisor $x^{2}$ .

$x^{3}$

$9 x^{2}$

$99 x$

$1089$

$x^{2}$

$11 x$

$0$

$x^{5}$

$2 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$x^{5}$

$11 x^{4}$

$0$

$9 x^{4}$

$0$

$0 x^{2}$

$0 x$

$9 x^{4}$

$99 x^{3}$

$0$

$99 x^{3}$

$0$

$0 x$

$0$

$99 x^{3}$

$1089 x^{2}$

$0$

$1089 x^{2}$

$0$

Step 19

Multiply the new quotient term by the divisor.

$x^{3}$

$9 x^{2}$

$99 x$

$1089$

$x^{2}$

$11 x$

$0$

$x^{5}$

$2 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$x^{5}$

$11 x^{4}$

$0$

$9 x^{4}$

$0$

$0 x^{2}$

$0 x$

$9 x^{4}$

$99 x^{3}$

$0$

$99 x^{3}$

$0$

$0 x$

$0$

$99 x^{3}$

$1089 x^{2}$

$0$

$1089 x^{2}$

$0$

$1089 x^{2}$

$11979 x$

$0$

Step 20

The expression needs to be subtracted from the dividend, so change all the signs in $1089 x^{2} - 11979 x + 0$

$x^{3}$

$9 x^{2}$

$99 x$

$1089$

$x^{2}$

$11 x$

$0$

$x^{5}$

$2 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$x^{5}$

$11 x^{4}$

$0$

$9 x^{4}$

$0$

$0 x^{2}$

$0 x$

$9 x^{4}$

$99 x^{3}$

$0$

$99 x^{3}$

$0$

$0 x$

$0$

$99 x^{3}$

$1089 x^{2}$

$0$

$1089 x^{2}$

$0$

$1089 x^{2}$

$11979 x$

$0$

Step 21

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

$x^{3}$

$9 x^{2}$

$99 x$

$1089$

$x^{2}$

$11 x$

$0$

$x^{5}$

$2 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$x^{5}$

$11 x^{4}$

$0$

$9 x^{4}$

$0$

$0 x^{2}$

$0 x$

$9 x^{4}$

$99 x^{3}$

$0$

$99 x^{3}$

$0$

$0 x$

$0$

$99 x^{3}$

$1089 x^{2}$

$0$

$1089 x^{2}$

$0$

$1089 x^{2}$

$11979 x$

$0$

$11979 x$

$0$

Step 22

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

$x^{3} + 9 x^{2} + 99 x + 1089 + \frac{11979 x}{x^{2} - 11 x}$