Algebra Examples

$(- 10 x^{2} + 4 x^{3} + 3) \div (x^{2} - 2 x + 1)$

Step 1

Reorder $- 10 x^{2}$ and $4 x^{3}$ .

$\frac{4 x^{3} - 10 x^{2} + 3}{x^{2} - 2 x + 1}$

Step 2

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

$x^{2}$

$2 x$

$1$

$4 x^{3}$

$10 x^{2}$

$0 x$

$3$

Step 3

Divide the highest order term in the dividend $4 x^{3}$ by the highest order term in divisor $x^{2}$ .

$4 x$

$x^{2}$

$2 x$

$1$

$4 x^{3}$

$10 x^{2}$

$0 x$

$3$

Step 4

Multiply the new quotient term by the divisor.

$4 x$

$x^{2}$

$2 x$

$1$

$4 x^{3}$

$10 x^{2}$

$0 x$

$3$

$4 x^{3}$

$8 x^{2}$

$4 x$

Step 5

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

$4 x$

$x^{2}$

$2 x$

$1$

$4 x^{3}$

$10 x^{2}$

$0 x$

$3$

$4 x^{3}$

$8 x^{2}$

$4 x$

Step 6

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

$4 x$

$x^{2}$

$2 x$

$1$

$4 x^{3}$

$10 x^{2}$

$0 x$

$3$

$4 x^{3}$

$8 x^{2}$

$4 x$

$2 x^{2}$

$4 x$

Step 7

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

$4 x$

$x^{2}$

$2 x$

$1$

$4 x^{3}$

$10 x^{2}$

$0 x$

$3$

$4 x^{3}$

$8 x^{2}$

$4 x$

$2 x^{2}$

$4 x$

$3$

Step 8

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

						$4 x$	-	$2$
$x^{2}$	-	$2 x$	+	$1$		$4 x^{3}$	-	$10 x^{2}$	+	$0 x$	+	$3$
					-	$4 x^{3}$	+	$8 x^{2}$	-	$4 x$
							-	$2 x^{2}$	-	$4 x$	+	$3$

Step 9

Multiply the new quotient term by the divisor.

						$4 x$	-	$2$
$x^{2}$	-	$2 x$	+	$1$		$4 x^{3}$	-	$10 x^{2}$	+	$0 x$	+	$3$
					-	$4 x^{3}$	+	$8 x^{2}$	-	$4 x$
							-	$2 x^{2}$	-	$4 x$	+	$3$
							-	$2 x^{2}$	+	$4 x$	-	$2$

Step 10

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

$4 x$

$2$

$x^{2}$

$2 x$

$1$

$4 x^{3}$

$10 x^{2}$

$0 x$

$3$

$4 x^{3}$

$8 x^{2}$

$4 x$

$2 x^{2}$

$4 x$

$3$

$2 x^{2}$

$4 x$

$2$

Step 11

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

						$4 x$	-	$2$
$x^{2}$	-	$2 x$	+	$1$		$4 x^{3}$	-	$10 x^{2}$	+	$0 x$	+	$3$
					-	$4 x^{3}$	+	$8 x^{2}$	-	$4 x$
							-	$2 x^{2}$	-	$4 x$	+	$3$
							+	$2 x^{2}$	-	$4 x$	+	$2$
									-	$8 x$	+	$5$

Step 12

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

$4 x - 2 + \frac{- 8 x + 5}{x^{2} - 2 x + 1}$