Pre-Algebra Examples

$(x^{3} + 6 x^{2} + 11 x + 6) \div (x^{2} + 4 x + 3)$

Step 1

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

$x^{2}$

$4 x$

$3$

$x^{3}$

$6 x^{2}$

$11 x$

$6$

Step 2

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

$x$

$x^{2}$

$4 x$

$3$

$x^{3}$

$6 x^{2}$

$11 x$

$6$

Step 3

Multiply the new quotient term by the divisor.

$x$

$x^{2}$

$4 x$

$3$

$x^{3}$

$6 x^{2}$

$11 x$

$6$

$x^{3}$

$4 x^{2}$

$3 x$

Step 4

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

$x$

$x^{2}$

$4 x$

$3$

$x^{3}$

$6 x^{2}$

$11 x$

$6$

$x^{3}$

$4 x^{2}$

$3 x$

Step 5

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

$x$

$x^{2}$

$4 x$

$3$

$x^{3}$

$6 x^{2}$

$11 x$

$6$

$x^{3}$

$4 x^{2}$

$3 x$

$2 x^{2}$

$8 x$

Step 6

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

$x$

$x^{2}$

$4 x$

$3$

$x^{3}$

$6 x^{2}$

$11 x$

$6$

$x^{3}$

$4 x^{2}$

$3 x$

$2 x^{2}$

$8 x$

$6$

Step 7

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

$x$

$2$

$x^{2}$

$4 x$

$3$

$x^{3}$

$6 x^{2}$

$11 x$

$6$

$x^{3}$

$4 x^{2}$

$3 x$

$2 x^{2}$

$8 x$

$6$

Step 8

Multiply the new quotient term by the divisor.

$x$

$2$

$x^{2}$

$4 x$

$3$

$x^{3}$

$6 x^{2}$

$11 x$

$6$

$x^{3}$

$4 x^{2}$

$3 x$

$2 x^{2}$

$8 x$

$6$

$2 x^{2}$

$8 x$

$6$

Step 9

The expression needs to be subtracted from the dividend, so change all the signs in $2 x^{2} + 8 x + 6$

$x$

$2$

$x^{2}$

$4 x$

$3$

$x^{3}$

$6 x^{2}$

$11 x$

$6$

$x^{3}$

$4 x^{2}$

$3 x$

$2 x^{2}$

$8 x$

$6$

$2 x^{2}$

$8 x$

$6$

Step 10

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

$x$

$2$

$x^{2}$

$4 x$

$3$

$x^{3}$

$6 x^{2}$

$11 x$

$6$

$x^{3}$

$4 x^{2}$

$3 x$

$2 x^{2}$

$8 x$

$6$

$2 x^{2}$

$8 x$

$6$

$0$

Step 11

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

$x + 2$