Find the Remainder 5x^4-3x^3+4x^2-7x-8 ; x-1

$5 x^{4} - 3 x^{3} + 4 x^{2} - 7 x - 8$ ; $x - 1$

Step 1

Divide the higher order polynomial by the other polynomial in order to find the remainder.

$\frac{5 x^{4} - 3 x^{3} + 4 x^{2} - 7 x - 8}{x - 1}$

Step 2

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

$x$

$1$

$5 x^{4}$

$3 x^{3}$

$4 x^{2}$

$7 x$

$8$

Step 3

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

					$5 x^{3}$
	$x$	-	$1$		$5 x^{4}$	-	$3 x^{3}$	+	$4 x^{2}$	-	$7 x$	-	$8$

Step 4

Multiply the new quotient term by the divisor.

				$5 x^{3}$
$x$	-	$1$		$5 x^{4}$	-	$3 x^{3}$	+	$4 x^{2}$	-	$7 x$	-	$8$
			+	$5 x^{4}$	-	$5 x^{3}$

Step 5

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

				$5 x^{3}$
$x$	-	$1$		$5 x^{4}$	-	$3 x^{3}$	+	$4 x^{2}$	-	$7 x$	-	$8$
			-	$5 x^{4}$	+	$5 x^{3}$

Step 6

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

$5 x^{3}$

$x$

$1$

$5 x^{4}$

$3 x^{3}$

$4 x^{2}$

$7 x$

$8$

$5 x^{4}$

$5 x^{3}$

$2 x^{3}$

Step 7

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

$5 x^{3}$

$x$

$1$

$5 x^{4}$

$3 x^{3}$

$4 x^{2}$

$7 x$

$8$

$5 x^{4}$

$5 x^{3}$

$2 x^{3}$

$4 x^{2}$

Step 8

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

$5 x^{3}$

$2 x^{2}$

$x$

$1$

$5 x^{4}$

$3 x^{3}$

$4 x^{2}$

$7 x$

$8$

$5 x^{4}$

$5 x^{3}$

$2 x^{3}$

$4 x^{2}$

Step 9

Multiply the new quotient term by the divisor.

$5 x^{3}$

$2 x^{2}$

$x$

$1$

$5 x^{4}$

$3 x^{3}$

$4 x^{2}$

$7 x$

$8$

$5 x^{4}$

$5 x^{3}$

$2 x^{3}$

$4 x^{2}$

$2 x^{3}$

$2 x^{2}$

Step 10

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

$5 x^{3}$

$2 x^{2}$

$x$

$1$

$5 x^{4}$

$3 x^{3}$

$4 x^{2}$

$7 x$

$8$

$5 x^{4}$

$5 x^{3}$

$2 x^{3}$

$4 x^{2}$

$2 x^{3}$

$2 x^{2}$

Step 11

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

$5 x^{3}$

$2 x^{2}$

$x$

$1$

$5 x^{4}$

$3 x^{3}$

$4 x^{2}$

$7 x$

$8$

$5 x^{4}$

$5 x^{3}$

$2 x^{3}$

$4 x^{2}$

$2 x^{3}$

$2 x^{2}$

$6 x^{2}$

Step 12

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

$5 x^{3}$

$2 x^{2}$

$x$

$1$

$5 x^{4}$

$3 x^{3}$

$4 x^{2}$

$7 x$

$8$

$5 x^{4}$

$5 x^{3}$

$2 x^{3}$

$4 x^{2}$

$2 x^{3}$

$2 x^{2}$

$6 x^{2}$

$7 x$

Step 13

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

$5 x^{3}$

$2 x^{2}$

$6 x$

$x$

$1$

$5 x^{4}$

$3 x^{3}$

$4 x^{2}$

$7 x$

$8$

$5 x^{4}$

$5 x^{3}$

$2 x^{3}$

$4 x^{2}$

$2 x^{3}$

$2 x^{2}$

$6 x^{2}$

$7 x$

Step 14

Multiply the new quotient term by the divisor.

$5 x^{3}$

$2 x^{2}$

$6 x$

$x$

$1$

$5 x^{4}$

$3 x^{3}$

$4 x^{2}$

$7 x$

$8$

$5 x^{4}$

$5 x^{3}$

$2 x^{3}$

$4 x^{2}$

$2 x^{3}$

$2 x^{2}$

$6 x^{2}$

$7 x$

$6 x^{2}$

$6 x$

Step 15

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

$5 x^{3}$

$2 x^{2}$

$6 x$

$x$

$1$

$5 x^{4}$

$3 x^{3}$

$4 x^{2}$

$7 x$

$8$

$5 x^{4}$

$5 x^{3}$

$2 x^{3}$

$4 x^{2}$

$2 x^{3}$

$2 x^{2}$

$6 x^{2}$

$7 x$

$6 x^{2}$

$6 x$

Step 16

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

$5 x^{3}$

$2 x^{2}$

$6 x$

$x$

$1$

$5 x^{4}$

$3 x^{3}$

$4 x^{2}$

$7 x$

$8$

$5 x^{4}$

$5 x^{3}$

$2 x^{3}$

$4 x^{2}$

$2 x^{3}$

$2 x^{2}$

$6 x^{2}$

$7 x$

$6 x^{2}$

$6 x$

$x$

Step 17

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

$5 x^{3}$

$2 x^{2}$

$6 x$

$x$

$1$

$5 x^{4}$

$3 x^{3}$

$4 x^{2}$

$7 x$

$8$

$5 x^{4}$

$5 x^{3}$

$2 x^{3}$

$4 x^{2}$

$2 x^{3}$

$2 x^{2}$

$6 x^{2}$

$7 x$

$6 x^{2}$

$6 x$

$x$

$8$

Step 18

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

$5 x^{3}$

$2 x^{2}$

$6 x$

$1$

$x$

$1$

$5 x^{4}$

$3 x^{3}$

$4 x^{2}$

$7 x$

$8$

$5 x^{4}$

$5 x^{3}$

$2 x^{3}$

$4 x^{2}$

$2 x^{3}$

$2 x^{2}$

$6 x^{2}$

$7 x$

$6 x^{2}$

$6 x$

$x$

$8$

Step 19

Multiply the new quotient term by the divisor.

$5 x^{3}$

$2 x^{2}$

$6 x$

$1$

$x$

$1$

$5 x^{4}$

$3 x^{3}$

$4 x^{2}$

$7 x$

$8$

$5 x^{4}$

$5 x^{3}$

$2 x^{3}$

$4 x^{2}$

$2 x^{3}$

$2 x^{2}$

$6 x^{2}$

$7 x$

$6 x^{2}$

$6 x$

$x$

$8$

$x$

$1$

Step 20

The expression needs to be subtracted from the dividend, so change all the signs in $- x + 1$

$5 x^{3}$

$2 x^{2}$

$6 x$

$1$

$x$

$1$

$5 x^{4}$

$3 x^{3}$

$4 x^{2}$

$7 x$

$8$

$5 x^{4}$

$5 x^{3}$

$2 x^{3}$

$4 x^{2}$

$2 x^{3}$

$2 x^{2}$

$6 x^{2}$

$7 x$

$6 x^{2}$

$6 x$

$x$

$8$

$x$

$1$

Step 21

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

$5 x^{3}$

$2 x^{2}$

$6 x$

$1$

$x$

$1$

$5 x^{4}$

$3 x^{3}$

$4 x^{2}$

$7 x$

$8$

$5 x^{4}$

$5 x^{3}$

$2 x^{3}$

$4 x^{2}$

$2 x^{3}$

$2 x^{2}$

$6 x^{2}$

$7 x$

$6 x^{2}$

$6 x$

$x$

$8$

$x$

$1$

$9$

Step 22

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

$5 x^{3} + 2 x^{2} + 6 x - 1 - \frac{9}{x - 1}$

Step 23

The remainder is the part of the answer that is left after the division by $x - 1$ is complete.

$- 9$

Find the Remainder 5x^4-3x^3+4x^2-7x-8 ; x-1

Related Questions

Support LCMGCF.com by disabling your adblocker.