Algebra Examples

$\frac{x^{3} + 4 - 11 x + 3 x^{2}}{6 + x}$

Step 1

Expand $x^{3} + 4 - 11 x + 3 x^{2}$ .

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Step 1.1

Move $4$ .

$\frac{x^{3} - 11 x + 4 + 3 x^{2}}{6 + x}$

Step 1.2

Move $4$ .

$\frac{x^{3} - 11 x + 3 x^{2} + 4}{6 + x}$

Step 1.3

Move $- 11 x$ .

$\frac{x^{3} + 3 x^{2} - 11 x + 4}{6 + x}$

Step 2

Reorder $6$ and $x$ .

$\frac{x^{3} + 3 x^{2} - 11 x + 4}{x + 6}$

Step 3

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

$x$

$6$

$x^{3}$

$3 x^{2}$

$11 x$

$4$

Step 4

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

					$x^{2}$
	$x$	+	$6$		$x^{3}$	+	$3 x^{2}$	-	$11 x$	+	$4$

Step 5

Multiply the new quotient term by the divisor.

				$x^{2}$
$x$	+	$6$		$x^{3}$	+	$3 x^{2}$	-	$11 x$	+	$4$
			+	$x^{3}$	+	$6 x^{2}$

Step 6

The expression needs to be subtracted from the dividend, so change all the signs in $x^{3} + 6 x^{2}$

				$x^{2}$
$x$	+	$6$		$x^{3}$	+	$3 x^{2}$	-	$11 x$	+	$4$
			-	$x^{3}$	-	$6 x^{2}$

Step 7

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

				$x^{2}$
$x$	+	$6$		$x^{3}$	+	$3 x^{2}$	-	$11 x$	+	$4$
			-	$x^{3}$	-	$6 x^{2}$
					-	$3 x^{2}$

Step 8

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

				$x^{2}$
$x$	+	$6$		$x^{3}$	+	$3 x^{2}$	-	$11 x$	+	$4$
			-	$x^{3}$	-	$6 x^{2}$
					-	$3 x^{2}$	-	$11 x$

Step 9

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

				$x^{2}$	-	$3 x$
$x$	+	$6$		$x^{3}$	+	$3 x^{2}$	-	$11 x$	+	$4$
			-	$x^{3}$	-	$6 x^{2}$
					-	$3 x^{2}$	-	$11 x$

Step 10

Multiply the new quotient term by the divisor.

				$x^{2}$	-	$3 x$
$x$	+	$6$		$x^{3}$	+	$3 x^{2}$	-	$11 x$	+	$4$
			-	$x^{3}$	-	$6 x^{2}$
					-	$3 x^{2}$	-	$11 x$
					-	$3 x^{2}$	-	$18 x$

Step 11

The expression needs to be subtracted from the dividend, so change all the signs in $- 3 x^{2} - 18 x$

				$x^{2}$	-	$3 x$
$x$	+	$6$		$x^{3}$	+	$3 x^{2}$	-	$11 x$	+	$4$
			-	$x^{3}$	-	$6 x^{2}$
					-	$3 x^{2}$	-	$11 x$
					+	$3 x^{2}$	+	$18 x$

Step 12

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

				$x^{2}$	-	$3 x$
$x$	+	$6$		$x^{3}$	+	$3 x^{2}$	-	$11 x$	+	$4$
			-	$x^{3}$	-	$6 x^{2}$
					-	$3 x^{2}$	-	$11 x$
					+	$3 x^{2}$	+	$18 x$
							+	$7 x$

Step 13

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

				$x^{2}$	-	$3 x$
$x$	+	$6$		$x^{3}$	+	$3 x^{2}$	-	$11 x$	+	$4$
			-	$x^{3}$	-	$6 x^{2}$
					-	$3 x^{2}$	-	$11 x$
					+	$3 x^{2}$	+	$18 x$
							+	$7 x$	+	$4$

Step 14

Divide the highest order term in the dividend $7 x$ by the highest order term in divisor $x$ .

				$x^{2}$	-	$3 x$	+	$7$
$x$	+	$6$		$x^{3}$	+	$3 x^{2}$	-	$11 x$	+	$4$
			-	$x^{3}$	-	$6 x^{2}$
					-	$3 x^{2}$	-	$11 x$
					+	$3 x^{2}$	+	$18 x$
							+	$7 x$	+	$4$

Step 15

Multiply the new quotient term by the divisor.

				$x^{2}$	-	$3 x$	+	$7$
$x$	+	$6$		$x^{3}$	+	$3 x^{2}$	-	$11 x$	+	$4$
			-	$x^{3}$	-	$6 x^{2}$
					-	$3 x^{2}$	-	$11 x$
					+	$3 x^{2}$	+	$18 x$
							+	$7 x$	+	$4$
							+	$7 x$	+	$42$

Step 16

The expression needs to be subtracted from the dividend, so change all the signs in $7 x + 42$

				$x^{2}$	-	$3 x$	+	$7$
$x$	+	$6$		$x^{3}$	+	$3 x^{2}$	-	$11 x$	+	$4$
			-	$x^{3}$	-	$6 x^{2}$
					-	$3 x^{2}$	-	$11 x$
					+	$3 x^{2}$	+	$18 x$
							+	$7 x$	+	$4$
							-	$7 x$	-	$42$

Step 17

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

				$x^{2}$	-	$3 x$	+	$7$
$x$	+	$6$		$x^{3}$	+	$3 x^{2}$	-	$11 x$	+	$4$
			-	$x^{3}$	-	$6 x^{2}$
					-	$3 x^{2}$	-	$11 x$
					+	$3 x^{2}$	+	$18 x$
							+	$7 x$	+	$4$
							-	$7 x$	-	$42$
									-	$38$

Step 18

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

$x^{2} - 3 x + 7 - \frac{38}{x + 6}$