Pre-Algebra Examples

$\frac{x^{2} + 4 x - 5}{x^{2} + 9 x + 20}$

Step 1

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

$x^{2}$

$9 x$

$20$

$x^{2}$

$4 x$

$5$

Step 2

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

							$1$
	$x^{2}$	+	$9 x$	+	$20$		$x^{2}$	+	$4 x$	-	$5$

Step 3

Multiply the new quotient term by the divisor.

Step 4

The expression needs to be subtracted from the dividend, so change all the signs in $x^{2} + 9 x + 20$

Step 5

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

Step 6

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

$1 + \frac{- 5 x - 25}{x^{2} + 9 x + 20}$