Algebra Examples

$\frac{2 x^{4} - 4 - 7 x - 38 x^{2}}{x - 4}$

Step 1

To calculate the remainder, first divide the polynomials.

Tap for more steps...

Step 1.1

Expand $2 x^{4} - 4 - 7 x - 38 x^{2}$ .

Tap for more steps...

Step 1.1.1

Move $- 4$ .

$\frac{2 x^{4} - 7 x - 4 - 38 x^{2}}{x - 4}$

Step 1.1.2

Move $- 4$ .

$\frac{2 x^{4} - 7 x - 38 x^{2} - 4}{x - 4}$

Step 1.1.3

Move $- 7 x$ .

$\frac{2 x^{4} - 38 x^{2} - 7 x - 4}{x - 4}$

Step 1.2

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

$x$

$4$

$2 x^{4}$

$0 x^{3}$

$38 x^{2}$

$7 x$

$4$

Step 1.3

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

					$2 x^{3}$
	$x$	-	$4$		$2 x^{4}$	+	$0 x^{3}$	-	$38 x^{2}$	-	$7 x$	-	$4$

Step 1.4

Multiply the new quotient term by the divisor.

				$2 x^{3}$
$x$	-	$4$		$2 x^{4}$	+	$0 x^{3}$	-	$38 x^{2}$	-	$7 x$	-	$4$
			+	$2 x^{4}$	-	$8 x^{3}$

Step 1.5

The expression needs to be subtracted from the dividend, so change all the signs in $2 x^{4} - 8 x^{3}$

				$2 x^{3}$
$x$	-	$4$		$2 x^{4}$	+	$0 x^{3}$	-	$38 x^{2}$	-	$7 x$	-	$4$
			-	$2 x^{4}$	+	$8 x^{3}$

Step 1.6

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

$2 x^{3}$

$x$

$4$

$2 x^{4}$

$0 x^{3}$

$38 x^{2}$

$7 x$

$4$

$2 x^{4}$

$8 x^{3}$

Step 1.7

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

$2 x^{3}$

$x$

$4$

$2 x^{4}$

$0 x^{3}$

$38 x^{2}$

$7 x$

$4$

$2 x^{4}$

$8 x^{3}$

$38 x^{2}$

Step 1.8

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

$2 x^{3}$

$8 x^{2}$

$x$

$4$

$2 x^{4}$

$0 x^{3}$

$38 x^{2}$

$7 x$

$4$

$2 x^{4}$

$8 x^{3}$

$38 x^{2}$

Step 1.9

Multiply the new quotient term by the divisor.

$2 x^{3}$

$8 x^{2}$

$x$

$4$

$2 x^{4}$

$0 x^{3}$

$38 x^{2}$

$7 x$

$4$

$2 x^{4}$

$8 x^{3}$

$38 x^{2}$

$8 x^{3}$

$32 x^{2}$

Step 1.10

The expression needs to be subtracted from the dividend, so change all the signs in $8 x^{3} - 32 x^{2}$

$2 x^{3}$

$8 x^{2}$

$x$

$4$

$2 x^{4}$

$0 x^{3}$

$38 x^{2}$

$7 x$

$4$

$2 x^{4}$

$8 x^{3}$

$38 x^{2}$

$8 x^{3}$

$32 x^{2}$

Step 1.11

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

$2 x^{3}$

$8 x^{2}$

$x$

$4$

$2 x^{4}$

$0 x^{3}$

$38 x^{2}$

$7 x$

$4$

$2 x^{4}$

$8 x^{3}$

$38 x^{2}$

$8 x^{3}$

$32 x^{2}$

$6 x^{2}$

Step 1.12

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

$2 x^{3}$

$8 x^{2}$

$x$

$4$

$2 x^{4}$

$0 x^{3}$

$38 x^{2}$

$7 x$

$4$

$2 x^{4}$

$8 x^{3}$

$38 x^{2}$

$8 x^{3}$

$32 x^{2}$

$6 x^{2}$

$7 x$

Step 1.13

Divide the highest order term in the dividend $- 6 x^{2}$ by the highest order term in divisor $x$ .

$2 x^{3}$

$8 x^{2}$

$6 x$

$x$

$4$

$2 x^{4}$

$0 x^{3}$

$38 x^{2}$

$7 x$

$4$

$2 x^{4}$

$8 x^{3}$

$38 x^{2}$

$8 x^{3}$

$32 x^{2}$

$6 x^{2}$

$7 x$

Step 1.14

Multiply the new quotient term by the divisor.

$2 x^{3}$

$8 x^{2}$

$6 x$

$x$

$4$

$2 x^{4}$

$0 x^{3}$

$38 x^{2}$

$7 x$

$4$

$2 x^{4}$

$8 x^{3}$

$38 x^{2}$

$8 x^{3}$

$32 x^{2}$

$6 x^{2}$

$7 x$

$6 x^{2}$

$24 x$

Step 1.15

The expression needs to be subtracted from the dividend, so change all the signs in $- 6 x^{2} + 24 x$

$2 x^{3}$

$8 x^{2}$

$6 x$

$x$

$4$

$2 x^{4}$

$0 x^{3}$

$38 x^{2}$

$7 x$

$4$

$2 x^{4}$

$8 x^{3}$

$38 x^{2}$

$8 x^{3}$

$32 x^{2}$

$6 x^{2}$

$7 x$

$6 x^{2}$

$24 x$

Step 1.16

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

$2 x^{3}$

$8 x^{2}$

$6 x$

$x$

$4$

$2 x^{4}$

$0 x^{3}$

$38 x^{2}$

$7 x$

$4$

$2 x^{4}$

$8 x^{3}$

$38 x^{2}$

$8 x^{3}$

$32 x^{2}$

$6 x^{2}$

$7 x$

$6 x^{2}$

$24 x$

$31 x$

Step 1.17

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

$2 x^{3}$

$8 x^{2}$

$6 x$

$x$

$4$

$2 x^{4}$

$0 x^{3}$

$38 x^{2}$

$7 x$

$4$

$2 x^{4}$

$8 x^{3}$

$38 x^{2}$

$8 x^{3}$

$32 x^{2}$

$6 x^{2}$

$7 x$

$6 x^{2}$

$24 x$

$31 x$

$4$

Step 1.18

Divide the highest order term in the dividend $- 31 x$ by the highest order term in divisor $x$ .

				$2 x^{3}$	+	$8 x^{2}$	-	$6 x$	-	$31$
$x$	-	$4$		$2 x^{4}$	+	$0 x^{3}$	-	$38 x^{2}$	-	$7 x$	-	$4$
			-	$2 x^{4}$	+	$8 x^{3}$
					+	$8 x^{3}$	-	$38 x^{2}$
					-	$8 x^{3}$	+	$32 x^{2}$
							-	$6 x^{2}$	-	$7 x$
							+	$6 x^{2}$	-	$24 x$
									-	$31 x$	-	$4$

Step 1.19

Multiply the new quotient term by the divisor.

				$2 x^{3}$	+	$8 x^{2}$	-	$6 x$	-	$31$
$x$	-	$4$		$2 x^{4}$	+	$0 x^{3}$	-	$38 x^{2}$	-	$7 x$	-	$4$
			-	$2 x^{4}$	+	$8 x^{3}$
					+	$8 x^{3}$	-	$38 x^{2}$
					-	$8 x^{3}$	+	$32 x^{2}$
							-	$6 x^{2}$	-	$7 x$
							+	$6 x^{2}$	-	$24 x$
									-	$31 x$	-	$4$
									-	$31 x$	+	$124$

Step 1.20

The expression needs to be subtracted from the dividend, so change all the signs in $- 31 x + 124$

				$2 x^{3}$	+	$8 x^{2}$	-	$6 x$	-	$31$
$x$	-	$4$		$2 x^{4}$	+	$0 x^{3}$	-	$38 x^{2}$	-	$7 x$	-	$4$
			-	$2 x^{4}$	+	$8 x^{3}$
					+	$8 x^{3}$	-	$38 x^{2}$
					-	$8 x^{3}$	+	$32 x^{2}$
							-	$6 x^{2}$	-	$7 x$
							+	$6 x^{2}$	-	$24 x$
									-	$31 x$	-	$4$
									+	$31 x$	-	$124$

Step 1.21

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

				$2 x^{3}$	+	$8 x^{2}$	-	$6 x$	-	$31$
$x$	-	$4$		$2 x^{4}$	+	$0 x^{3}$	-	$38 x^{2}$	-	$7 x$	-	$4$
			-	$2 x^{4}$	+	$8 x^{3}$
					+	$8 x^{3}$	-	$38 x^{2}$
					-	$8 x^{3}$	+	$32 x^{2}$
							-	$6 x^{2}$	-	$7 x$
							+	$6 x^{2}$	-	$24 x$
									-	$31 x$	-	$4$
									+	$31 x$	-	$124$
											-	$128$

Step 1.22

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

$2 x^{3} + 8 x^{2} - 6 x - 31 - \frac{128}{x - 4}$

Step 2

Since the last term in the resulting expression is a fraction, the numerator of the fraction is the remainder.

$- 128$