Algebra Examples

$- 24 x^{4} + 39 x^{3} - 18 x^{2} + 21 x - 18$ by $3 x - 3$

Step 1

Write the problem as a mathematical expression.

$\frac{- 24 x^{4} + 39 x^{3} - 18 x^{2} + 21 x - 18}{3 x - 3}$

Step 2

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

$3 x$

$3$

$24 x^{4}$

$39 x^{3}$

$18 x^{2}$

$21 x$

$18$

Step 3

Divide the highest order term in the dividend $- 24 x^{4}$ by the highest order term in divisor $3 x$ .

				-	$8 x^{3}$
	$3 x$	-	$3$	-	$24 x^{4}$	+	$39 x^{3}$	-	$18 x^{2}$	+	$21 x$	-	$18$

Step 4

Multiply the new quotient term by the divisor.

			-	$8 x^{3}$
$3 x$	-	$3$	-	$24 x^{4}$	+	$39 x^{3}$	-	$18 x^{2}$	+	$21 x$	-	$18$
			-	$24 x^{4}$	+	$24 x^{3}$

Step 5

The expression needs to be subtracted from the dividend, so change all the signs in $- 24 x^{4} + 24 x^{3}$

			-	$8 x^{3}$
$3 x$	-	$3$	-	$24 x^{4}$	+	$39 x^{3}$	-	$18 x^{2}$	+	$21 x$	-	$18$
			+	$24 x^{4}$	-	$24 x^{3}$

Step 6

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

$8 x^{3}$

$3 x$

$3$

$24 x^{4}$

$39 x^{3}$

$18 x^{2}$

$21 x$

$18$

$24 x^{4}$

$24 x^{3}$

$15 x^{3}$

Step 7

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

$8 x^{3}$

$3 x$

$3$

$24 x^{4}$

$39 x^{3}$

$18 x^{2}$

$21 x$

$18$

$24 x^{4}$

$24 x^{3}$

$15 x^{3}$

$18 x^{2}$

Step 8

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

$8 x^{3}$

$5 x^{2}$

$3 x$

$3$

$24 x^{4}$

$39 x^{3}$

$18 x^{2}$

$21 x$

$18$

$24 x^{4}$

$24 x^{3}$

$15 x^{3}$

$18 x^{2}$

Step 9

Multiply the new quotient term by the divisor.

$8 x^{3}$

$5 x^{2}$

$3 x$

$3$

$24 x^{4}$

$39 x^{3}$

$18 x^{2}$

$21 x$

$18$

$24 x^{4}$

$24 x^{3}$

$15 x^{3}$

$18 x^{2}$

$15 x^{3}$

$15 x^{2}$

Step 10

The expression needs to be subtracted from the dividend, so change all the signs in $15 x^{3} - 15 x^{2}$

$8 x^{3}$

$5 x^{2}$

$3 x$

$3$

$24 x^{4}$

$39 x^{3}$

$18 x^{2}$

$21 x$

$18$

$24 x^{4}$

$24 x^{3}$

$15 x^{3}$

$18 x^{2}$

$15 x^{3}$

$15 x^{2}$

Step 11

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

$8 x^{3}$

$5 x^{2}$

$3 x$

$3$

$24 x^{4}$

$39 x^{3}$

$18 x^{2}$

$21 x$

$18$

$24 x^{4}$

$24 x^{3}$

$15 x^{3}$

$18 x^{2}$

$15 x^{3}$

$15 x^{2}$

$3 x^{2}$

Step 12

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

$8 x^{3}$

$5 x^{2}$

$3 x$

$3$

$24 x^{4}$

$39 x^{3}$

$18 x^{2}$

$21 x$

$18$

$24 x^{4}$

$24 x^{3}$

$15 x^{3}$

$18 x^{2}$

$15 x^{3}$

$15 x^{2}$

$3 x^{2}$

$21 x$

Step 13

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

$8 x^{3}$

$5 x^{2}$

$x$

$3 x$

$3$

$24 x^{4}$

$39 x^{3}$

$18 x^{2}$

$21 x$

$18$

$24 x^{4}$

$24 x^{3}$

$15 x^{3}$

$18 x^{2}$

$15 x^{3}$

$15 x^{2}$

$3 x^{2}$

$21 x$

Step 14

Multiply the new quotient term by the divisor.

$8 x^{3}$

$5 x^{2}$

$x$

$3 x$

$3$

$24 x^{4}$

$39 x^{3}$

$18 x^{2}$

$21 x$

$18$

$24 x^{4}$

$24 x^{3}$

$15 x^{3}$

$18 x^{2}$

$15 x^{3}$

$15 x^{2}$

$3 x^{2}$

$21 x$

$3 x^{2}$

$3 x$

Step 15

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

$8 x^{3}$

$5 x^{2}$

$x$

$3 x$

$3$

$24 x^{4}$

$39 x^{3}$

$18 x^{2}$

$21 x$

$18$

$24 x^{4}$

$24 x^{3}$

$15 x^{3}$

$18 x^{2}$

$15 x^{3}$

$15 x^{2}$

$3 x^{2}$

$21 x$

$3 x^{2}$

$3 x$

Step 16

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

$8 x^{3}$

$5 x^{2}$

$x$

$3 x$

$3$

$24 x^{4}$

$39 x^{3}$

$18 x^{2}$

$21 x$

$18$

$24 x^{4}$

$24 x^{3}$

$15 x^{3}$

$18 x^{2}$

$15 x^{3}$

$15 x^{2}$

$3 x^{2}$

$21 x$

$3 x^{2}$

$3 x$

$18 x$

Step 17

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

$8 x^{3}$

$5 x^{2}$

$x$

$3 x$

$3$

$24 x^{4}$

$39 x^{3}$

$18 x^{2}$

$21 x$

$18$

$24 x^{4}$

$24 x^{3}$

$15 x^{3}$

$18 x^{2}$

$15 x^{3}$

$15 x^{2}$

$3 x^{2}$

$21 x$

$3 x^{2}$

$3 x$

$18 x$

$18$

Step 18

Divide the highest order term in the dividend $18 x$ by the highest order term in divisor $3 x$ .

$8 x^{3}$

$5 x^{2}$

$x$

$6$

$3 x$

$3$

$24 x^{4}$

$39 x^{3}$

$18 x^{2}$

$21 x$

$18$

$24 x^{4}$

$24 x^{3}$

$15 x^{3}$

$18 x^{2}$

$15 x^{3}$

$15 x^{2}$

$3 x^{2}$

$21 x$

$3 x^{2}$

$3 x$

$18 x$

$18$

Step 19

Multiply the new quotient term by the divisor.

$8 x^{3}$

$5 x^{2}$

$x$

$6$

$3 x$

$3$

$24 x^{4}$

$39 x^{3}$

$18 x^{2}$

$21 x$

$18$

$24 x^{4}$

$24 x^{3}$

$15 x^{3}$

$18 x^{2}$

$15 x^{3}$

$15 x^{2}$

$3 x^{2}$

$21 x$

$3 x^{2}$

$3 x$

$18 x$

$18$

$18 x$

$18$

Step 20

The expression needs to be subtracted from the dividend, so change all the signs in $18 x - 18$

$8 x^{3}$

$5 x^{2}$

$x$

$6$

$3 x$

$3$

$24 x^{4}$

$39 x^{3}$

$18 x^{2}$

$21 x$

$18$

$24 x^{4}$

$24 x^{3}$

$15 x^{3}$

$18 x^{2}$

$15 x^{3}$

$15 x^{2}$

$3 x^{2}$

$21 x$

$3 x^{2}$

$3 x$

$18 x$

$18$

$18 x$

$18$

Step 21

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

$8 x^{3}$

$5 x^{2}$

$x$

$6$

$3 x$

$3$

$24 x^{4}$

$39 x^{3}$

$18 x^{2}$

$21 x$

$18$

$24 x^{4}$

$24 x^{3}$

$15 x^{3}$

$18 x^{2}$

$15 x^{3}$

$15 x^{2}$

$3 x^{2}$

$21 x$

$3 x^{2}$

$3 x$

$18 x$

$18$

$18 x$

$18$

$0$

Step 22

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

$- 8 x^{3} + 5 x^{2} - x + 6$