Precalculus Examples

$\frac{35 x^{5} + 20 x^{4} - 57 x^{3} + x^{2} + 18 x - 30}{5 x^{2} - 6}$

Step 1

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

$5 x^{2}$

$0 x$

$6$

$35 x^{5}$

$20 x^{4}$

$57 x^{3}$

$x^{2}$

$18 x$

$30$

Step 2

Divide the highest order term in the dividend $35 x^{5}$ by the highest order term in divisor $5 x^{2}$ .

$7 x^{3}$

$5 x^{2}$

$0 x$

$6$

$35 x^{5}$

$20 x^{4}$

$57 x^{3}$

$x^{2}$

$18 x$

$30$

Step 3

Multiply the new quotient term by the divisor.

$7 x^{3}$

$5 x^{2}$

$0 x$

$6$

$35 x^{5}$

$20 x^{4}$

$57 x^{3}$

$x^{2}$

$18 x$

$30$

$35 x^{5}$

$0$

$42 x^{3}$

Step 4

The expression needs to be subtracted from the dividend, so change all the signs in $35 x^{5} + 0 - 42 x^{3}$

$7 x^{3}$

$5 x^{2}$

$0 x$

$6$

$35 x^{5}$

$20 x^{4}$

$57 x^{3}$

$x^{2}$

$18 x$

$30$

$35 x^{5}$

$0$

$42 x^{3}$

Step 5

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

$7 x^{3}$

$5 x^{2}$

$0 x$

$6$

$35 x^{5}$

$20 x^{4}$

$57 x^{3}$

$x^{2}$

$18 x$

$30$

$35 x^{5}$

$0$

$42 x^{3}$

$20 x^{4}$

$15 x^{3}$

Step 6

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

$7 x^{3}$

$5 x^{2}$

$0 x$

$6$

$35 x^{5}$

$20 x^{4}$

$57 x^{3}$

$x^{2}$

$18 x$

$30$

$35 x^{5}$

$0$

$42 x^{3}$

$20 x^{4}$

$15 x^{3}$

$x^{2}$

Step 7

Divide the highest order term in the dividend $20 x^{4}$ by the highest order term in divisor $5 x^{2}$ .

$7 x^{3}$

$4 x^{2}$

$5 x^{2}$

$0 x$

$6$

$35 x^{5}$

$20 x^{4}$

$57 x^{3}$

$x^{2}$

$18 x$

$30$

$35 x^{5}$

$0$

$42 x^{3}$

$20 x^{4}$

$15 x^{3}$

$x^{2}$

Step 8

Multiply the new quotient term by the divisor.

$7 x^{3}$

$4 x^{2}$

$5 x^{2}$

$0 x$

$6$

$35 x^{5}$

$20 x^{4}$

$57 x^{3}$

$x^{2}$

$18 x$

$30$

$35 x^{5}$

$0$

$42 x^{3}$

$20 x^{4}$

$15 x^{3}$

$x^{2}$

$20 x^{4}$

$0$

$24 x^{2}$

Step 9

The expression needs to be subtracted from the dividend, so change all the signs in $20 x^{4} + 0 - 24 x^{2}$

$7 x^{3}$

$4 x^{2}$

$5 x^{2}$

$0 x$

$6$

$35 x^{5}$

$20 x^{4}$

$57 x^{3}$

$x^{2}$

$18 x$

$30$

$35 x^{5}$

$0$

$42 x^{3}$

$20 x^{4}$

$15 x^{3}$

$x^{2}$

$20 x^{4}$

$0$

$24 x^{2}$

Step 10

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

$7 x^{3}$

$4 x^{2}$

$5 x^{2}$

$0 x$

$6$

$35 x^{5}$

$20 x^{4}$

$57 x^{3}$

$x^{2}$

$18 x$

$30$

$35 x^{5}$

$0$

$42 x^{3}$

$20 x^{4}$

$15 x^{3}$

$x^{2}$

$20 x^{4}$

$0$

$24 x^{2}$

$15 x^{3}$

$25 x^{2}$

Step 11

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

$7 x^{3}$

$4 x^{2}$

$5 x^{2}$

$0 x$

$6$

$35 x^{5}$

$20 x^{4}$

$57 x^{3}$

$x^{2}$

$18 x$

$30$

$35 x^{5}$

$0$

$42 x^{3}$

$20 x^{4}$

$15 x^{3}$

$x^{2}$

$20 x^{4}$

$0$

$24 x^{2}$

$15 x^{3}$

$25 x^{2}$

$18 x$

Step 12

Divide the highest order term in the dividend $- 15 x^{3}$ by the highest order term in divisor $5 x^{2}$ .

$7 x^{3}$

$4 x^{2}$

$3 x$

$5 x^{2}$

$0 x$

$6$

$35 x^{5}$

$20 x^{4}$

$57 x^{3}$

$x^{2}$

$18 x$

$30$

$35 x^{5}$

$0$

$42 x^{3}$

$20 x^{4}$

$15 x^{3}$

$x^{2}$

$20 x^{4}$

$0$

$24 x^{2}$

$15 x^{3}$

$25 x^{2}$

$18 x$

Step 13

Multiply the new quotient term by the divisor.

$7 x^{3}$

$4 x^{2}$

$3 x$

$5 x^{2}$

$0 x$

$6$

$35 x^{5}$

$20 x^{4}$

$57 x^{3}$

$x^{2}$

$18 x$

$30$

$35 x^{5}$

$0$

$42 x^{3}$

$20 x^{4}$

$15 x^{3}$

$x^{2}$

$20 x^{4}$

$0$

$24 x^{2}$

$15 x^{3}$

$25 x^{2}$

$18 x$

$15 x^{3}$

$0$

$18 x$

Step 14

The expression needs to be subtracted from the dividend, so change all the signs in $- 15 x^{3} + 0 + 18 x$

$7 x^{3}$

$4 x^{2}$

$3 x$

$5 x^{2}$

$0 x$

$6$

$35 x^{5}$

$20 x^{4}$

$57 x^{3}$

$x^{2}$

$18 x$

$30$

$35 x^{5}$

$0$

$42 x^{3}$

$20 x^{4}$

$15 x^{3}$

$x^{2}$

$20 x^{4}$

$0$

$24 x^{2}$

$15 x^{3}$

$25 x^{2}$

$18 x$

$15 x^{3}$

$0$

$18 x$

Step 15

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

$7 x^{3}$

$4 x^{2}$

$3 x$

$5 x^{2}$

$0 x$

$6$

$35 x^{5}$

$20 x^{4}$

$57 x^{3}$

$x^{2}$

$18 x$

$30$

$35 x^{5}$

$0$

$42 x^{3}$

$20 x^{4}$

$15 x^{3}$

$x^{2}$

$20 x^{4}$

$0$

$24 x^{2}$

$15 x^{3}$

$25 x^{2}$

$18 x$

$15 x^{3}$

$0$

$18 x$

$25 x^{2}$

$0$

Step 16

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

$7 x^{3}$

$4 x^{2}$

$3 x$

$5 x^{2}$

$0 x$

$6$

$35 x^{5}$

$20 x^{4}$

$57 x^{3}$

$x^{2}$

$18 x$

$30$

$35 x^{5}$

$0$

$42 x^{3}$

$20 x^{4}$

$15 x^{3}$

$x^{2}$

$20 x^{4}$

$0$

$24 x^{2}$

$15 x^{3}$

$25 x^{2}$

$18 x$

$15 x^{3}$

$0$

$18 x$

$25 x^{2}$

$0$

$30$

Step 17

Divide the highest order term in the dividend $25 x^{2}$ by the highest order term in divisor $5 x^{2}$ .

$7 x^{3}$

$4 x^{2}$

$3 x$

$5$

$5 x^{2}$

$0 x$

$6$

$35 x^{5}$

$20 x^{4}$

$57 x^{3}$

$x^{2}$

$18 x$

$30$

$35 x^{5}$

$0$

$42 x^{3}$

$20 x^{4}$

$15 x^{3}$

$x^{2}$

$20 x^{4}$

$0$

$24 x^{2}$

$15 x^{3}$

$25 x^{2}$

$18 x$

$15 x^{3}$

$0$

$18 x$

$25 x^{2}$

$0$

$30$

Step 18

Multiply the new quotient term by the divisor.

$7 x^{3}$

$4 x^{2}$

$3 x$

$5$

$5 x^{2}$

$0 x$

$6$

$35 x^{5}$

$20 x^{4}$

$57 x^{3}$

$x^{2}$

$18 x$

$30$

$35 x^{5}$

$0$

$42 x^{3}$

$20 x^{4}$

$15 x^{3}$

$x^{2}$

$20 x^{4}$

$0$

$24 x^{2}$

$15 x^{3}$

$25 x^{2}$

$18 x$

$15 x^{3}$

$0$

$18 x$

$25 x^{2}$

$0$

$30$

$25 x^{2}$

$0$

$30$

Step 19

The expression needs to be subtracted from the dividend, so change all the signs in $25 x^{2} + 0 - 30$

$7 x^{3}$

$4 x^{2}$

$3 x$

$5$

$5 x^{2}$

$0 x$

$6$

$35 x^{5}$

$20 x^{4}$

$57 x^{3}$

$x^{2}$

$18 x$

$30$

$35 x^{5}$

$0$

$42 x^{3}$

$20 x^{4}$

$15 x^{3}$

$x^{2}$

$20 x^{4}$

$0$

$24 x^{2}$

$15 x^{3}$

$25 x^{2}$

$18 x$

$15 x^{3}$

$0$

$18 x$

$25 x^{2}$

$0$

$30$

$25 x^{2}$

$0$

$30$

Step 20

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

$7 x^{3}$

$4 x^{2}$

$3 x$

$5$

$5 x^{2}$

$0 x$

$6$

$35 x^{5}$

$20 x^{4}$

$57 x^{3}$

$x^{2}$

$18 x$

$30$

$35 x^{5}$

$0$

$42 x^{3}$

$20 x^{4}$

$15 x^{3}$

$x^{2}$

$20 x^{4}$

$0$

$24 x^{2}$

$15 x^{3}$

$25 x^{2}$

$18 x$

$15 x^{3}$

$0$

$18 x$

$25 x^{2}$

$0$

$30$

$25 x^{2}$

$0$

$30$

$0$

Step 21

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

$7 x^{3} + 4 x^{2} - 3 x + 5$