Algebra Examples

$(8 x^{5} + 6 x^{4} - x^{3} + 1) \div (2 x^{3} - x^{2} - 3)$

Step 1

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

$2 x^{3}$

$x^{2}$

$0 x$

$3$

$8 x^{5}$

$6 x^{4}$

$x^{3}$

$0 x^{2}$

$0 x$

$1$

Step 2

Divide the highest order term in the dividend $8 x^{5}$ by the highest order term in divisor $2 x^{3}$ .

$4 x^{2}$

$2 x^{3}$

$x^{2}$

$0 x$

$3$

$8 x^{5}$

$6 x^{4}$

$x^{3}$

$0 x^{2}$

$0 x$

$1$

Step 3

Multiply the new quotient term by the divisor.

$4 x^{2}$

$2 x^{3}$

$x^{2}$

$0 x$

$3$

$8 x^{5}$

$6 x^{4}$

$x^{3}$

$0 x^{2}$

$0 x$

$1$

$8 x^{5}$

$4 x^{4}$

$0$

$12 x^{2}$

Step 4

The expression needs to be subtracted from the dividend, so change all the signs in $8 x^{5} - 4 x^{4} + 0 - 12 x^{2}$

$4 x^{2}$

$2 x^{3}$

$x^{2}$

$0 x$

$3$

$8 x^{5}$

$6 x^{4}$

$x^{3}$

$0 x^{2}$

$0 x$

$1$

$8 x^{5}$

$4 x^{4}$

$0$

$12 x^{2}$

Step 5

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

$4 x^{2}$

$2 x^{3}$

$x^{2}$

$0 x$

$3$

$8 x^{5}$

$6 x^{4}$

$x^{3}$

$0 x^{2}$

$0 x$

$1$

$8 x^{5}$

$4 x^{4}$

$0$

$12 x^{2}$

$10 x^{4}$

$x^{3}$

$12 x^{2}$

Step 6

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

$4 x^{2}$

$2 x^{3}$

$x^{2}$

$0 x$

$3$

$8 x^{5}$

$6 x^{4}$

$x^{3}$

$0 x^{2}$

$0 x$

$1$

$8 x^{5}$

$4 x^{4}$

$0$

$12 x^{2}$

$10 x^{4}$

$x^{3}$

$12 x^{2}$

$0 x$

Step 7

Divide the highest order term in the dividend $10 x^{4}$ by the highest order term in divisor $2 x^{3}$ .

$4 x^{2}$

$5 x$

$2 x^{3}$

$x^{2}$

$0 x$

$3$

$8 x^{5}$

$6 x^{4}$

$x^{3}$

$0 x^{2}$

$0 x$

$1$

$8 x^{5}$

$4 x^{4}$

$0$

$12 x^{2}$

$10 x^{4}$

$x^{3}$

$12 x^{2}$

$0 x$

Step 8

Multiply the new quotient term by the divisor.

$4 x^{2}$

$5 x$

$2 x^{3}$

$x^{2}$

$0 x$

$3$

$8 x^{5}$

$6 x^{4}$

$x^{3}$

$0 x^{2}$

$0 x$

$1$

$8 x^{5}$

$4 x^{4}$

$0$

$12 x^{2}$

$10 x^{4}$

$x^{3}$

$12 x^{2}$

$0 x$

$10 x^{4}$

$5 x^{3}$

$0$

$15 x$

Step 9

The expression needs to be subtracted from the dividend, so change all the signs in $10 x^{4} - 5 x^{3} + 0 - 15 x$

$4 x^{2}$

$5 x$

$2 x^{3}$

$x^{2}$

$0 x$

$3$

$8 x^{5}$

$6 x^{4}$

$x^{3}$

$0 x^{2}$

$0 x$

$1$

$8 x^{5}$

$4 x^{4}$

$0$

$12 x^{2}$

$10 x^{4}$

$x^{3}$

$12 x^{2}$

$0 x$

$10 x^{4}$

$5 x^{3}$

$0$

$15 x$

Step 10

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

$4 x^{2}$

$5 x$

$2 x^{3}$

$x^{2}$

$0 x$

$3$

$8 x^{5}$

$6 x^{4}$

$x^{3}$

$0 x^{2}$

$0 x$

$1$

$8 x^{5}$

$4 x^{4}$

$0$

$12 x^{2}$

$10 x^{4}$

$x^{3}$

$12 x^{2}$

$0 x$

$10 x^{4}$

$5 x^{3}$

$0$

$15 x$

$4 x^{3}$

$12 x^{2}$

$15 x$

Step 11

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

$4 x^{2}$

$5 x$

$2 x^{3}$

$x^{2}$

$0 x$

$3$

$8 x^{5}$

$6 x^{4}$

$x^{3}$

$0 x^{2}$

$0 x$

$1$

$8 x^{5}$

$4 x^{4}$

$0$

$12 x^{2}$

$10 x^{4}$

$x^{3}$

$12 x^{2}$

$0 x$

$10 x^{4}$

$5 x^{3}$

$0$

$15 x$

$4 x^{3}$

$12 x^{2}$

$15 x$

$1$

Step 12

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

$4 x^{2}$

$5 x$

$2$

$2 x^{3}$

$x^{2}$

$0 x$

$3$

$8 x^{5}$

$6 x^{4}$

$x^{3}$

$0 x^{2}$

$0 x$

$1$

$8 x^{5}$

$4 x^{4}$

$0$

$12 x^{2}$

$10 x^{4}$

$x^{3}$

$12 x^{2}$

$0 x$

$10 x^{4}$

$5 x^{3}$

$0$

$15 x$

$4 x^{3}$

$12 x^{2}$

$15 x$

$1$

Step 13

Multiply the new quotient term by the divisor.

$4 x^{2}$

$5 x$

$2$

$2 x^{3}$

$x^{2}$

$0 x$

$3$

$8 x^{5}$

$6 x^{4}$

$x^{3}$

$0 x^{2}$

$0 x$

$1$

$8 x^{5}$

$4 x^{4}$

$0$

$12 x^{2}$

$10 x^{4}$

$x^{3}$

$12 x^{2}$

$0 x$

$10 x^{4}$

$5 x^{3}$

$0$

$15 x$

$4 x^{3}$

$12 x^{2}$

$15 x$

$1$

$4 x^{3}$

$2 x^{2}$

$0$

$6$

Step 14

The expression needs to be subtracted from the dividend, so change all the signs in $4 x^{3} - 2 x^{2} + 0 - 6$

$4 x^{2}$

$5 x$

$2$

$2 x^{3}$

$x^{2}$

$0 x$

$3$

$8 x^{5}$

$6 x^{4}$

$x^{3}$

$0 x^{2}$

$0 x$

$1$

$8 x^{5}$

$4 x^{4}$

$0$

$12 x^{2}$

$10 x^{4}$

$x^{3}$

$12 x^{2}$

$0 x$

$10 x^{4}$

$5 x^{3}$

$0$

$15 x$

$4 x^{3}$

$12 x^{2}$

$15 x$

$1$

$4 x^{3}$

$2 x^{2}$

$0$

$6$

Step 15

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

$4 x^{2}$

$5 x$

$2$

$2 x^{3}$

$x^{2}$

$0 x$

$3$

$8 x^{5}$

$6 x^{4}$

$x^{3}$

$0 x^{2}$

$0 x$

$1$

$8 x^{5}$

$4 x^{4}$

$0$

$12 x^{2}$

$10 x^{4}$

$x^{3}$

$12 x^{2}$

$0 x$

$10 x^{4}$

$5 x^{3}$

$0$

$15 x$

$4 x^{3}$

$12 x^{2}$

$15 x$

$1$

$4 x^{3}$

$2 x^{2}$

$0$

$6$

$14 x^{2}$

$15 x$

$7$

Step 16

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

$4 x^{2} + 5 x + 2 + \frac{14 x^{2} + 15 x + 7}{2 x^{3} - x^{2} - 3}$