Algebra Examples

$(12 x^{7} - 8 x^{5} + 16 x^{4} + 6 x^{2}) \div 4 x^{3}$

Step 1

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

$4 x^{3}$

$0 x^{2}$

$0 x$

$0$

$12 x^{7}$

$0 x^{6}$

$8 x^{5}$

$16 x^{4}$

$0 x^{3}$

$6 x^{2}$

$0 x$

$0$

Step 2

Divide the highest order term in the dividend $12 x^{7}$ by the highest order term in divisor $4 x^{3}$ .

$3 x^{4}$

$4 x^{3}$

$0 x^{2}$

$0 x$

$0$

$12 x^{7}$

$0 x^{6}$

$8 x^{5}$

$16 x^{4}$

$0 x^{3}$

$6 x^{2}$

$0 x$

$0$

Step 3

Multiply the new quotient term by the divisor.

$3 x^{4}$

$4 x^{3}$

$0 x^{2}$

$0 x$

$0$

$12 x^{7}$

$0 x^{6}$

$8 x^{5}$

$16 x^{4}$

$0 x^{3}$

$6 x^{2}$

$0 x$

$0$

$12 x^{7}$

$0$

Step 4

The expression needs to be subtracted from the dividend, so change all the signs in $12 x^{7} + 0 + 0 + 0$

$3 x^{4}$

$4 x^{3}$

$0 x^{2}$

$0 x$

$0$

$12 x^{7}$

$0 x^{6}$

$8 x^{5}$

$16 x^{4}$

$0 x^{3}$

$6 x^{2}$

$0 x$

$0$

$12 x^{7}$

$0$

Step 5

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

$3 x^{4}$

$4 x^{3}$

$0 x^{2}$

$0 x$

$0$

$12 x^{7}$

$0 x^{6}$

$8 x^{5}$

$16 x^{4}$

$0 x^{3}$

$6 x^{2}$

$0 x$

$0$

$12 x^{7}$

$0$

$8 x^{5}$

$16 x^{4}$

Step 6

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

$3 x^{4}$

$4 x^{3}$

$0 x^{2}$

$0 x$

$0$

$12 x^{7}$

$0 x^{6}$

$8 x^{5}$

$16 x^{4}$

$0 x^{3}$

$6 x^{2}$

$0 x$

$0$

$12 x^{7}$

$0$

$8 x^{5}$

$16 x^{4}$

$0 x^{3}$

$6 x^{2}$

Step 7

Divide the highest order term in the dividend $- 8 x^{5}$ by the highest order term in divisor $4 x^{3}$ .

$3 x^{4}$

$0 x^{3}$

$2 x^{2}$

$4 x^{3}$

$0 x^{2}$

$0 x$

$0$

$12 x^{7}$

$0 x^{6}$

$8 x^{5}$

$16 x^{4}$

$0 x^{3}$

$6 x^{2}$

$0 x$

$0$

$12 x^{7}$

$0$

$8 x^{5}$

$16 x^{4}$

$0 x^{3}$

$6 x^{2}$

Step 8

Multiply the new quotient term by the divisor.

$3 x^{4}$

$0 x^{3}$

$2 x^{2}$

$4 x^{3}$

$0 x^{2}$

$0 x$

$0$

$12 x^{7}$

$0 x^{6}$

$8 x^{5}$

$16 x^{4}$

$0 x^{3}$

$6 x^{2}$

$0 x$

$0$

$12 x^{7}$

$0$

$8 x^{5}$

$16 x^{4}$

$0 x^{3}$

$6 x^{2}$

$8 x^{5}$

$0$

Step 9

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

$3 x^{4}$

$0 x^{3}$

$2 x^{2}$

$4 x^{3}$

$0 x^{2}$

$0 x$

$0$

$12 x^{7}$

$0 x^{6}$

$8 x^{5}$

$16 x^{4}$

$0 x^{3}$

$6 x^{2}$

$0 x$

$0$

$12 x^{7}$

$0$

$8 x^{5}$

$16 x^{4}$

$0 x^{3}$

$6 x^{2}$

$8 x^{5}$

$0$

Step 10

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

$3 x^{4}$

$0 x^{3}$

$2 x^{2}$

$4 x^{3}$

$0 x^{2}$

$0 x$

$0$

$12 x^{7}$

$0 x^{6}$

$8 x^{5}$

$16 x^{4}$

$0 x^{3}$

$6 x^{2}$

$0 x$

$0$

$12 x^{7}$

$0$

$8 x^{5}$

$16 x^{4}$

$0 x^{3}$

$6 x^{2}$

$8 x^{5}$

$0$

$16 x^{4}$

$0$

$6 x^{2}$

Step 11

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

$3 x^{4}$

$0 x^{3}$

$2 x^{2}$

$4 x^{3}$

$0 x^{2}$

$0 x$

$0$

$12 x^{7}$

$0 x^{6}$

$8 x^{5}$

$16 x^{4}$

$0 x^{3}$

$6 x^{2}$

$0 x$

$0$

$12 x^{7}$

$0$

$8 x^{5}$

$16 x^{4}$

$0 x^{3}$

$6 x^{2}$

$8 x^{5}$

$0$

$16 x^{4}$

$0$

$6 x^{2}$

$0 x$

$0$

Step 12

Divide the highest order term in the dividend $16 x^{4}$ by the highest order term in divisor $4 x^{3}$ .

$3 x^{4}$

$0 x^{3}$

$2 x^{2}$

$4 x$

$4 x^{3}$

$0 x^{2}$

$0 x$

$0$

$12 x^{7}$

$0 x^{6}$

$8 x^{5}$

$16 x^{4}$

$0 x^{3}$

$6 x^{2}$

$0 x$

$0$

$12 x^{7}$

$0$

$8 x^{5}$

$16 x^{4}$

$0 x^{3}$

$6 x^{2}$

$8 x^{5}$

$0$

$16 x^{4}$

$0$

$6 x^{2}$

$0 x$

$0$

Step 13

Multiply the new quotient term by the divisor.

$3 x^{4}$

$0 x^{3}$

$2 x^{2}$

$4 x$

$4 x^{3}$

$0 x^{2}$

$0 x$

$0$

$12 x^{7}$

$0 x^{6}$

$8 x^{5}$

$16 x^{4}$

$0 x^{3}$

$6 x^{2}$

$0 x$

$0$

$12 x^{7}$

$0$

$8 x^{5}$

$16 x^{4}$

$0 x^{3}$

$6 x^{2}$

$8 x^{5}$

$0$

$16 x^{4}$

$0$

$6 x^{2}$

$0 x$

$0$

$16 x^{4}$

$0$

Step 14

The expression needs to be subtracted from the dividend, so change all the signs in $16 x^{4} + 0 + 0 + 0$

$3 x^{4}$

$0 x^{3}$

$2 x^{2}$

$4 x$

$4 x^{3}$

$0 x^{2}$

$0 x$

$0$

$12 x^{7}$

$0 x^{6}$

$8 x^{5}$

$16 x^{4}$

$0 x^{3}$

$6 x^{2}$

$0 x$

$0$

$12 x^{7}$

$0$

$8 x^{5}$

$16 x^{4}$

$0 x^{3}$

$6 x^{2}$

$8 x^{5}$

$0$

$16 x^{4}$

$0$

$6 x^{2}$

$0 x$

$0$

$16 x^{4}$

$0$

Step 15

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

$3 x^{4}$

$0 x^{3}$

$2 x^{2}$

$4 x$

$4 x^{3}$

$0 x^{2}$

$0 x$

$0$

$12 x^{7}$

$0 x^{6}$

$8 x^{5}$

$16 x^{4}$

$0 x^{3}$

$6 x^{2}$

$0 x$

$0$

$12 x^{7}$

$0$

$8 x^{5}$

$16 x^{4}$

$0 x^{3}$

$6 x^{2}$

$8 x^{5}$

$0$

$16 x^{4}$

$0$

$6 x^{2}$

$0 x$

$0$

$16 x^{4}$

$0$

$6 x^{2}$

$0$

Step 16

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

$3 x^{4}$

$0 x^{3}$

$2 x^{2}$

$4 x$

$4 x^{3}$

$0 x^{2}$

$0 x$

$0$

$12 x^{7}$

$0 x^{6}$

$8 x^{5}$

$16 x^{4}$

$0 x^{3}$

$6 x^{2}$

$0 x$

$0$

$12 x^{7}$

$0$

$8 x^{5}$

$16 x^{4}$

$0 x^{3}$

$6 x^{2}$

$8 x^{5}$

$0$

$16 x^{4}$

$0$

$6 x^{2}$

$0 x$

$0$

$16 x^{4}$

$0$

$6 x^{2}$

$0$

Step 17

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

$3 x^{4} - 2 x^{2} + 4 x + \frac{6 x^{2}}{4 x^{3}}$