Algebra Examples

$\frac{x^{5} + 3 x - 7 + 2 x^{2}}{x^{2} - 3 x - 1}$

Step 1

Expand $x^{5} + 3 x - 7 + 2 x^{2}$ .

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Step 1.1

Move $- 7$ .

$\frac{x^{5} + 3 x + 2 x^{2} - 7}{x^{2} - 3 x - 1}$

Step 1.2

Move $3 x$ .

$\frac{x^{5} + 2 x^{2} + 3 x - 7}{x^{2} - 3 x - 1}$

Step 2

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

$x^{2}$

$3 x$

$1$

$x^{5}$

$0 x^{4}$

$0 x^{3}$

$2 x^{2}$

$3 x$

$7$

Step 3

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

$x^{3}$

$x^{2}$

$3 x$

$1$

$x^{5}$

$0 x^{4}$

$0 x^{3}$

$2 x^{2}$

$3 x$

$7$

Step 4

Multiply the new quotient term by the divisor.

$x^{3}$

$x^{2}$

$3 x$

$1$

$x^{5}$

$0 x^{4}$

$0 x^{3}$

$2 x^{2}$

$3 x$

$7$

$x^{5}$

$3 x^{4}$

$x^{3}$

Step 5

The expression needs to be subtracted from the dividend, so change all the signs in $x^{5} - 3 x^{4} - x^{3}$

$x^{3}$

$x^{2}$

$3 x$

$1$

$x^{5}$

$0 x^{4}$

$0 x^{3}$

$2 x^{2}$

$3 x$

$7$

$x^{5}$

$3 x^{4}$

$x^{3}$

Step 6

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

$x^{3}$

$x^{2}$

$3 x$

$1$

$x^{5}$

$0 x^{4}$

$0 x^{3}$

$2 x^{2}$

$3 x$

$7$

$x^{5}$

$3 x^{4}$

$x^{3}$

$3 x^{4}$

$x^{3}$

Step 7

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

$x^{3}$

$x^{2}$

$3 x$

$1$

$x^{5}$

$0 x^{4}$

$0 x^{3}$

$2 x^{2}$

$3 x$

$7$

$x^{5}$

$3 x^{4}$

$x^{3}$

$3 x^{4}$

$x^{3}$

$2 x^{2}$

Step 8

Divide the highest order term in the dividend $3 x^{4}$ by the highest order term in divisor $x^{2}$ .

$x^{3}$

$3 x^{2}$

$x^{2}$

$3 x$

$1$

$x^{5}$

$0 x^{4}$

$0 x^{3}$

$2 x^{2}$

$3 x$

$7$

$x^{5}$

$3 x^{4}$

$x^{3}$

$3 x^{4}$

$x^{3}$

$2 x^{2}$

Step 9

Multiply the new quotient term by the divisor.

$x^{3}$

$3 x^{2}$

$x^{2}$

$3 x$

$1$

$x^{5}$

$0 x^{4}$

$0 x^{3}$

$2 x^{2}$

$3 x$

$7$

$x^{5}$

$3 x^{4}$

$x^{3}$

$3 x^{4}$

$x^{3}$

$2 x^{2}$

$3 x^{4}$

$9 x^{3}$

$3 x^{2}$

Step 10

The expression needs to be subtracted from the dividend, so change all the signs in $3 x^{4} - 9 x^{3} - 3 x^{2}$

$x^{3}$

$3 x^{2}$

$x^{2}$

$3 x$

$1$

$x^{5}$

$0 x^{4}$

$0 x^{3}$

$2 x^{2}$

$3 x$

$7$

$x^{5}$

$3 x^{4}$

$x^{3}$

$3 x^{4}$

$x^{3}$

$2 x^{2}$

$3 x^{4}$

$9 x^{3}$

$3 x^{2}$

Step 11

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

$x^{3}$

$3 x^{2}$

$x^{2}$

$3 x$

$1$

$x^{5}$

$0 x^{4}$

$0 x^{3}$

$2 x^{2}$

$3 x$

$7$

$x^{5}$

$3 x^{4}$

$x^{3}$

$3 x^{4}$

$x^{3}$

$2 x^{2}$

$3 x^{4}$

$9 x^{3}$

$3 x^{2}$

$10 x^{3}$

$5 x^{2}$

Step 12

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

$x^{3}$

$3 x^{2}$

$x^{2}$

$3 x$

$1$

$x^{5}$

$0 x^{4}$

$0 x^{3}$

$2 x^{2}$

$3 x$

$7$

$x^{5}$

$3 x^{4}$

$x^{3}$

$3 x^{4}$

$x^{3}$

$2 x^{2}$

$3 x^{4}$

$9 x^{3}$

$3 x^{2}$

$10 x^{3}$

$5 x^{2}$

$3 x$

Step 13

Divide the highest order term in the dividend $10 x^{3}$ by the highest order term in divisor $x^{2}$ .

$x^{3}$

$3 x^{2}$

$10 x$

$x^{2}$

$3 x$

$1$

$x^{5}$

$0 x^{4}$

$0 x^{3}$

$2 x^{2}$

$3 x$

$7$

$x^{5}$

$3 x^{4}$

$x^{3}$

$3 x^{4}$

$x^{3}$

$2 x^{2}$

$3 x^{4}$

$9 x^{3}$

$3 x^{2}$

$10 x^{3}$

$5 x^{2}$

$3 x$

Step 14

Multiply the new quotient term by the divisor.

$x^{3}$

$3 x^{2}$

$10 x$

$x^{2}$

$3 x$

$1$

$x^{5}$

$0 x^{4}$

$0 x^{3}$

$2 x^{2}$

$3 x$

$7$

$x^{5}$

$3 x^{4}$

$x^{3}$

$3 x^{4}$

$x^{3}$

$2 x^{2}$

$3 x^{4}$

$9 x^{3}$

$3 x^{2}$

$10 x^{3}$

$5 x^{2}$

$3 x$

$10 x^{3}$

$30 x^{2}$

$10 x$

Step 15

The expression needs to be subtracted from the dividend, so change all the signs in $10 x^{3} - 30 x^{2} - 10 x$

$x^{3}$

$3 x^{2}$

$10 x$

$x^{2}$

$3 x$

$1$

$x^{5}$

$0 x^{4}$

$0 x^{3}$

$2 x^{2}$

$3 x$

$7$

$x^{5}$

$3 x^{4}$

$x^{3}$

$3 x^{4}$

$x^{3}$

$2 x^{2}$

$3 x^{4}$

$9 x^{3}$

$3 x^{2}$

$10 x^{3}$

$5 x^{2}$

$3 x$

$10 x^{3}$

$30 x^{2}$

$10 x$

Step 16

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

$x^{3}$

$3 x^{2}$

$10 x$

$x^{2}$

$3 x$

$1$

$x^{5}$

$0 x^{4}$

$0 x^{3}$

$2 x^{2}$

$3 x$

$7$

$x^{5}$

$3 x^{4}$

$x^{3}$

$3 x^{4}$

$x^{3}$

$2 x^{2}$

$3 x^{4}$

$9 x^{3}$

$3 x^{2}$

$10 x^{3}$

$5 x^{2}$

$3 x$

$10 x^{3}$

$30 x^{2}$

$10 x$

$35 x^{2}$

$13 x$

Step 17

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

$x^{3}$

$3 x^{2}$

$10 x$

$x^{2}$

$3 x$

$1$

$x^{5}$

$0 x^{4}$

$0 x^{3}$

$2 x^{2}$

$3 x$

$7$

$x^{5}$

$3 x^{4}$

$x^{3}$

$3 x^{4}$

$x^{3}$

$2 x^{2}$

$3 x^{4}$

$9 x^{3}$

$3 x^{2}$

$10 x^{3}$

$5 x^{2}$

$3 x$

$10 x^{3}$

$30 x^{2}$

$10 x$

$35 x^{2}$

$13 x$

$7$

Step 18

Divide the highest order term in the dividend $35 x^{2}$ by the highest order term in divisor $x^{2}$ .

$x^{3}$

$3 x^{2}$

$10 x$

$35$

$x^{2}$

$3 x$

$1$

$x^{5}$

$0 x^{4}$

$0 x^{3}$

$2 x^{2}$

$3 x$

$7$

$x^{5}$

$3 x^{4}$

$x^{3}$

$3 x^{4}$

$x^{3}$

$2 x^{2}$

$3 x^{4}$

$9 x^{3}$

$3 x^{2}$

$10 x^{3}$

$5 x^{2}$

$3 x$

$10 x^{3}$

$30 x^{2}$

$10 x$

$35 x^{2}$

$13 x$

$7$

Step 19

Multiply the new quotient term by the divisor.

$x^{3}$

$3 x^{2}$

$10 x$

$35$

$x^{2}$

$3 x$

$1$

$x^{5}$

$0 x^{4}$

$0 x^{3}$

$2 x^{2}$

$3 x$

$7$

$x^{5}$

$3 x^{4}$

$x^{3}$

$3 x^{4}$

$x^{3}$

$2 x^{2}$

$3 x^{4}$

$9 x^{3}$

$3 x^{2}$

$10 x^{3}$

$5 x^{2}$

$3 x$

$10 x^{3}$

$30 x^{2}$

$10 x$

$35 x^{2}$

$13 x$

$7$

$35 x^{2}$

$105 x$

$35$

Step 20

The expression needs to be subtracted from the dividend, so change all the signs in $35 x^{2} - 105 x - 35$

$x^{3}$

$3 x^{2}$

$10 x$

$35$

$x^{2}$

$3 x$

$1$

$x^{5}$

$0 x^{4}$

$0 x^{3}$

$2 x^{2}$

$3 x$

$7$

$x^{5}$

$3 x^{4}$

$x^{3}$

$3 x^{4}$

$x^{3}$

$2 x^{2}$

$3 x^{4}$

$9 x^{3}$

$3 x^{2}$

$10 x^{3}$

$5 x^{2}$

$3 x$

$10 x^{3}$

$30 x^{2}$

$10 x$

$35 x^{2}$

$13 x$

$7$

$35 x^{2}$

$105 x$

$35$

Step 21

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

$x^{3}$

$3 x^{2}$

$10 x$

$35$

$x^{2}$

$3 x$

$1$

$x^{5}$

$0 x^{4}$

$0 x^{3}$

$2 x^{2}$

$3 x$

$7$

$x^{5}$

$3 x^{4}$

$x^{3}$

$3 x^{4}$

$x^{3}$

$2 x^{2}$

$3 x^{4}$

$9 x^{3}$

$3 x^{2}$

$10 x^{3}$

$5 x^{2}$

$3 x$

$10 x^{3}$

$30 x^{2}$

$10 x$

$35 x^{2}$

$13 x$

$7$

$35 x^{2}$

$105 x$

$35$

$118 x$

$28$

Step 22

The quotient is $x^{3} + 3 x^{2} + 10 x + 35$ .

$x^{3} + 3 x^{2} + 10 x + 35$