Divide Using Long Polynomial Division (x^4+x^3+7x^2-6x+8)/(x^2+2x+8)

$\frac{x^{4} + x^{3} + 7 x^{2} - 6 x + 8}{x^{2} + 2 x + 8}$

Step 1

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

$x^{2}$

$2 x$

$8$

$x^{4}$

$x^{3}$

$7 x^{2}$

$6 x$

$8$

Step 2

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

$x^{2}$

$2 x$

$8$

$x^{4}$

$x^{3}$

$7 x^{2}$

$6 x$

$8$

Step 3

Multiply the new quotient term by the divisor.

$x^{2}$

$2 x$

$8$

$x^{4}$

$x^{3}$

$7 x^{2}$

$6 x$

$8$

$x^{4}$

$2 x^{3}$

$8 x^{2}$

Step 4

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

$x^{2}$

$2 x$

$8$

$x^{4}$

$x^{3}$

$7 x^{2}$

$6 x$

$8$

$x^{4}$

$2 x^{3}$

$8 x^{2}$

Step 5

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

$x^{2}$

$2 x$

$8$

$x^{4}$

$x^{3}$

$7 x^{2}$

$6 x$

$8$

$x^{4}$

$2 x^{3}$

$8 x^{2}$

$x^{3}$

$x^{2}$

Step 6

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

$x^{2}$

$2 x$

$8$

$x^{4}$

$x^{3}$

$7 x^{2}$

$6 x$

$8$

$x^{4}$

$2 x^{3}$

$8 x^{2}$

$x^{3}$

$x^{2}$

$6 x$

Step 7

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

$x^{2}$

$x$

$x^{2}$

$2 x$

$8$

$x^{4}$

$x^{3}$

$7 x^{2}$

$6 x$

$8$

$x^{4}$

$2 x^{3}$

$8 x^{2}$

$x^{3}$

$x^{2}$

$6 x$

Step 8

Multiply the new quotient term by the divisor.

$x^{2}$

$x$

$x^{2}$

$2 x$

$8$

$x^{4}$

$x^{3}$

$7 x^{2}$

$6 x$

$8$

$x^{4}$

$2 x^{3}$

$8 x^{2}$

$x^{3}$

$x^{2}$

$6 x$

$x^{3}$

$2 x^{2}$

$8 x$

Step 9

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

$x^{2}$

$x$

$x^{2}$

$2 x$

$8$

$x^{4}$

$x^{3}$

$7 x^{2}$

$6 x$

$8$

$x^{4}$

$2 x^{3}$

$8 x^{2}$

$x^{3}$

$x^{2}$

$6 x$

$x^{3}$

$2 x^{2}$

$8 x$

Step 10

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

$x^{2}$

$x$

$x^{2}$

$2 x$

$8$

$x^{4}$

$x^{3}$

$7 x^{2}$

$6 x$

$8$

$x^{4}$

$2 x^{3}$

$8 x^{2}$

$x^{3}$

$x^{2}$

$6 x$

$x^{3}$

$2 x^{2}$

$8 x$

$x^{2}$

$2 x$

Step 11

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

$x^{2}$

$x$

$x^{2}$

$2 x$

$8$

$x^{4}$

$x^{3}$

$7 x^{2}$

$6 x$

$8$

$x^{4}$

$2 x^{3}$

$8 x^{2}$

$x^{3}$

$x^{2}$

$6 x$

$x^{3}$

$2 x^{2}$

$8 x$

$x^{2}$

$2 x$

$8$

Step 12

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

$x^{2}$

$x$

$1$

$x^{2}$

$2 x$

$8$

$x^{4}$

$x^{3}$

$7 x^{2}$

$6 x$

$8$

$x^{4}$

$2 x^{3}$

$8 x^{2}$

$x^{3}$

$x^{2}$

$6 x$

$x^{3}$

$2 x^{2}$

$8 x$

$x^{2}$

$2 x$

$8$

Step 13

Multiply the new quotient term by the divisor.

$x^{2}$

$x$

$1$

$x^{2}$

$2 x$

$8$

$x^{4}$

$x^{3}$

$7 x^{2}$

$6 x$

$8$

$x^{4}$

$2 x^{3}$

$8 x^{2}$

$x^{3}$

$x^{2}$

$6 x$

$x^{3}$

$2 x^{2}$

$8 x$

$x^{2}$

$2 x$

$8$

$x^{2}$

$2 x$

$8$

Step 14

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

$x^{2}$

$x$

$1$

$x^{2}$

$2 x$

$8$

$x^{4}$

$x^{3}$

$7 x^{2}$

$6 x$

$8$

$x^{4}$

$2 x^{3}$

$8 x^{2}$

$x^{3}$

$x^{2}$

$6 x$

$x^{3}$

$2 x^{2}$

$8 x$

$x^{2}$

$2 x$

$8$

$x^{2}$

$2 x$

$8$

Step 15

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

$x^{2}$

$x$

$1$

$x^{2}$

$2 x$

$8$

$x^{4}$

$x^{3}$

$7 x^{2}$

$6 x$

$8$

$x^{4}$

$2 x^{3}$

$8 x^{2}$

$x^{3}$

$x^{2}$

$6 x$

$x^{3}$

$2 x^{2}$

$8 x$

$x^{2}$

$2 x$

$8$

$x^{2}$

$2 x$

$8$

$0$

Step 16

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

$x^{2} - x + 1$

Divide Using Long Polynomial Division (x^4+x^3+7x^2-6x+8)/(x^2+2x+8)

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