Algebra Examples

$(x^{4} - 2 x^{3} - 11 x^{2} + 30 x - 20)$ entre $(x^{2} + 3 x - 2)$

Step 1

Write the problem as a mathematical expression.

$\frac{(x^{4} - 2 x^{3} - 11 x^{2} + 30 x - 20)}{(x^{2} + 3 x - 2)}$

Step 2

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

$x^{2}$

$3 x$

$2$

$x^{4}$

$2 x^{3}$

$11 x^{2}$

$30 x$

$20$

Step 3

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

							$x^{2}$
	$x^{2}$	+	$3 x$	-	$2$		$x^{4}$	-	$2 x^{3}$	-	$11 x^{2}$	+	$30 x$	-	$20$

Step 4

Multiply the new quotient term by the divisor.

$x^{2}$

$3 x$

$2$

$x^{4}$

$2 x^{3}$

$11 x^{2}$

$30 x$

$20$

$x^{4}$

$3 x^{3}$

$2 x^{2}$

Step 5

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

$x^{2}$

$3 x$

$2$

$x^{4}$

$2 x^{3}$

$11 x^{2}$

$30 x$

$20$

$x^{4}$

$3 x^{3}$

$2 x^{2}$

Step 6

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

						$x^{2}$
$x^{2}$	+	$3 x$	-	$2$		$x^{4}$	-	$2 x^{3}$	-	$11 x^{2}$	+	$30 x$	-	$20$
					-	$x^{4}$	-	$3 x^{3}$	+	$2 x^{2}$
							-	$5 x^{3}$	-	$9 x^{2}$

Step 7

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

$x^{2}$

$3 x$

$2$

$x^{4}$

$2 x^{3}$

$11 x^{2}$

$30 x$

$20$

$x^{4}$

$3 x^{3}$

$2 x^{2}$

$5 x^{3}$

$9 x^{2}$

$30 x$

Step 8

Divide the highest order term in the dividend $- 5 x^{3}$ by the highest order term in divisor $x^{2}$ .

$x^{2}$

$5 x$

$x^{2}$

$3 x$

$2$

$x^{4}$

$2 x^{3}$

$11 x^{2}$

$30 x$

$20$

$x^{4}$

$3 x^{3}$

$2 x^{2}$

$5 x^{3}$

$9 x^{2}$

$30 x$

Step 9

Multiply the new quotient term by the divisor.

$x^{2}$

$5 x$

$x^{2}$

$3 x$

$2$

$x^{4}$

$2 x^{3}$

$11 x^{2}$

$30 x$

$20$

$x^{4}$

$3 x^{3}$

$2 x^{2}$

$5 x^{3}$

$9 x^{2}$

$30 x$

$5 x^{3}$

$15 x^{2}$

$10 x$

Step 10

The expression needs to be subtracted from the dividend, so change all the signs in $- 5 x^{3} - 15 x^{2} + 10 x$

$x^{2}$

$5 x$

$x^{2}$

$3 x$

$2$

$x^{4}$

$2 x^{3}$

$11 x^{2}$

$30 x$

$20$

$x^{4}$

$3 x^{3}$

$2 x^{2}$

$5 x^{3}$

$9 x^{2}$

$30 x$

$5 x^{3}$

$15 x^{2}$

$10 x$

Step 11

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

$x^{2}$

$5 x$

$x^{2}$

$3 x$

$2$

$x^{4}$

$2 x^{3}$

$11 x^{2}$

$30 x$

$20$

$x^{4}$

$3 x^{3}$

$2 x^{2}$

$5 x^{3}$

$9 x^{2}$

$30 x$

$5 x^{3}$

$15 x^{2}$

$10 x$

$6 x^{2}$

$20 x$

Step 12

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

$x^{2}$

$5 x$

$x^{2}$

$3 x$

$2$

$x^{4}$

$2 x^{3}$

$11 x^{2}$

$30 x$

$20$

$x^{4}$

$3 x^{3}$

$2 x^{2}$

$5 x^{3}$

$9 x^{2}$

$30 x$

$5 x^{3}$

$15 x^{2}$

$10 x$

$6 x^{2}$

$20 x$

$20$

Step 13

Divide the highest order term in the dividend $6 x^{2}$ by the highest order term in divisor $x^{2}$ .

$x^{2}$

$5 x$

$6$

$x^{2}$

$3 x$

$2$

$x^{4}$

$2 x^{3}$

$11 x^{2}$

$30 x$

$20$

$x^{4}$

$3 x^{3}$

$2 x^{2}$

$5 x^{3}$

$9 x^{2}$

$30 x$

$5 x^{3}$

$15 x^{2}$

$10 x$

$6 x^{2}$

$20 x$

$20$

Step 14

Multiply the new quotient term by the divisor.

$x^{2}$

$5 x$

$6$

$x^{2}$

$3 x$

$2$

$x^{4}$

$2 x^{3}$

$11 x^{2}$

$30 x$

$20$

$x^{4}$

$3 x^{3}$

$2 x^{2}$

$5 x^{3}$

$9 x^{2}$

$30 x$

$5 x^{3}$

$15 x^{2}$

$10 x$

$6 x^{2}$

$20 x$

$20$

$6 x^{2}$

$18 x$

$12$

Step 15

The expression needs to be subtracted from the dividend, so change all the signs in $6 x^{2} + 18 x - 12$

$x^{2}$

$5 x$

$6$

$x^{2}$

$3 x$

$2$

$x^{4}$

$2 x^{3}$

$11 x^{2}$

$30 x$

$20$

$x^{4}$

$3 x^{3}$

$2 x^{2}$

$5 x^{3}$

$9 x^{2}$

$30 x$

$5 x^{3}$

$15 x^{2}$

$10 x$

$6 x^{2}$

$20 x$

$20$

$6 x^{2}$

$18 x$

$12$

Step 16

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

$x^{2}$

$5 x$

$6$

$x^{2}$

$3 x$

$2$

$x^{4}$

$2 x^{3}$

$11 x^{2}$

$30 x$

$20$

$x^{4}$

$3 x^{3}$

$2 x^{2}$

$5 x^{3}$

$9 x^{2}$

$30 x$

$5 x^{3}$

$15 x^{2}$

$10 x$

$6 x^{2}$

$20 x$

$20$

$6 x^{2}$

$18 x$

$12$

$2 x$

$8$

Step 17

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

$x^{2} - 5 x + 6 + \frac{2 x - 8}{x^{2} + 3 x - 2}$