Pre-Algebra Examples

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

Step 1

Subtract $3 x^{3}$ from $2 x^{3}$ .

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

Step 2

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

$x^{2}$

$x$

$2$

$x^{3}$

$0 x^{2}$

$8 x$

$2$

Step 3

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

						-	$x$
	$x^{2}$	-	$x$	+	$2$	-	$x^{3}$	+	$0 x^{2}$	+	$8 x$	-	$2$

Step 4

Multiply the new quotient term by the divisor.

$x$

$x^{2}$

$x$

$2$

$x^{3}$

$0 x^{2}$

$8 x$

$2$

$x^{3}$

$x^{2}$

$2 x$

Step 5

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

$x$

$x^{2}$

$x$

$2$

$x^{3}$

$0 x^{2}$

$8 x$

$2$

$x^{3}$

$x^{2}$

$2 x$

Step 6

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

$x$

$x^{2}$

$x$

$2$

$x^{3}$

$0 x^{2}$

$8 x$

$2$

$x^{3}$

$x^{2}$

$2 x$

$x^{2}$

$10 x$

Step 7

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

$x$

$x^{2}$

$x$

$2$

$x^{3}$

$0 x^{2}$

$8 x$

$2$

$x^{3}$

$x^{2}$

$2 x$

$x^{2}$

$10 x$

$2$

Step 8

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

					-	$x$	-	$1$
$x^{2}$	-	$x$	+	$2$	-	$x^{3}$	+	$0 x^{2}$	+	$8 x$	-	$2$
					+	$x^{3}$	-	$x^{2}$	+	$2 x$
							-	$x^{2}$	+	$10 x$	-	$2$

Step 9

Multiply the new quotient term by the divisor.

					-	$x$	-	$1$
$x^{2}$	-	$x$	+	$2$	-	$x^{3}$	+	$0 x^{2}$	+	$8 x$	-	$2$
					+	$x^{3}$	-	$x^{2}$	+	$2 x$
							-	$x^{2}$	+	$10 x$	-	$2$
							-	$x^{2}$	+	$x$	-	$2$

Step 10

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

					-	$x$	-	$1$
$x^{2}$	-	$x$	+	$2$	-	$x^{3}$	+	$0 x^{2}$	+	$8 x$	-	$2$
					+	$x^{3}$	-	$x^{2}$	+	$2 x$
							-	$x^{2}$	+	$10 x$	-	$2$
							+	$x^{2}$	-	$x$	+	$2$

Step 11

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

$x$

$1$

$x^{2}$

$x$

$2$

$x^{3}$

$0 x^{2}$

$8 x$

$2$

$x^{3}$

$x^{2}$

$2 x$

$x^{2}$

$10 x$

$2$

$x^{2}$

$x$

$2$

$9 x$

$0$

Step 12

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

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