Pre-Algebra Examples

$\frac{3 x^{5} + 15 x^{3} - 4 + 11 x^{2} + 7 x^{4} + 8 x}{2 + x^{2} + x}$

Step 1

Expand $3 x^{5} + 15 x^{3} - 4 + 11 x^{2} + 7 x^{4} + 8 x$ .

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Step 1.1

Move $- 4$ .

$\frac{3 x^{5} + 15 x^{3} + 11 x^{2} - 4 + 7 x^{4} + 8 x}{2 + x^{2} + x}$

Step 1.2

Move $- 4$ .

$\frac{3 x^{5} + 15 x^{3} + 11 x^{2} + 7 x^{4} - 4 + 8 x}{2 + x^{2} + x}$

Step 1.3

Move $11 x^{2}$ .

$\frac{3 x^{5} + 15 x^{3} + 7 x^{4} + 11 x^{2} - 4 + 8 x}{2 + x^{2} + x}$

Step 1.4

Move $15 x^{3}$ .

$\frac{3 x^{5} + 7 x^{4} + 15 x^{3} + 11 x^{2} - 4 + 8 x}{2 + x^{2} + x}$

Step 1.5

Move $- 4$ .

$\frac{3 x^{5} + 7 x^{4} + 15 x^{3} + 11 x^{2} + 8 x - 4}{2 + x^{2} + x}$

Step 2

Expand $2 + x^{2} + x$ .

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Step 2.1

Reorder $2$ and $x^{2}$ .

$\frac{3 x^{5} + 7 x^{4} + 15 x^{3} + 11 x^{2} + 8 x - 4}{x^{2} + 2 + x}$

Step 2.2

Move $2$ .

$\frac{3 x^{5} + 7 x^{4} + 15 x^{3} + 11 x^{2} + 8 x - 4}{x^{2} + x + 2}$

Step 3

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

$x^{2}$

$x$

$2$

$3 x^{5}$

$7 x^{4}$

$15 x^{3}$

$11 x^{2}$

$8 x$

$4$

Step 4

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

$3 x^{3}$

$x^{2}$

$x$

$2$

$3 x^{5}$

$7 x^{4}$

$15 x^{3}$

$11 x^{2}$

$8 x$

$4$

Step 5

Multiply the new quotient term by the divisor.

$3 x^{3}$

$x^{2}$

$x$

$2$

$3 x^{5}$

$7 x^{4}$

$15 x^{3}$

$11 x^{2}$

$8 x$

$4$

$3 x^{5}$

$3 x^{4}$

$6 x^{3}$

Step 6

The expression needs to be subtracted from the dividend, so change all the signs in $3 x^{5} + 3 x^{4} + 6 x^{3}$

$3 x^{3}$

$x^{2}$

$x$

$2$

$3 x^{5}$

$7 x^{4}$

$15 x^{3}$

$11 x^{2}$

$8 x$

$4$

$3 x^{5}$

$3 x^{4}$

$6 x^{3}$

Step 7

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

$3 x^{3}$

$x^{2}$

$x$

$2$

$3 x^{5}$

$7 x^{4}$

$15 x^{3}$

$11 x^{2}$

$8 x$

$4$

$3 x^{5}$

$3 x^{4}$

$6 x^{3}$

$4 x^{4}$

$9 x^{3}$

Step 8

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

$3 x^{3}$

$x^{2}$

$x$

$2$

$3 x^{5}$

$7 x^{4}$

$15 x^{3}$

$11 x^{2}$

$8 x$

$4$

$3 x^{5}$

$3 x^{4}$

$6 x^{3}$

$4 x^{4}$

$9 x^{3}$

$11 x^{2}$

Step 9

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

$3 x^{3}$

$4 x^{2}$

$x^{2}$

$x$

$2$

$3 x^{5}$

$7 x^{4}$

$15 x^{3}$

$11 x^{2}$

$8 x$

$4$

$3 x^{5}$

$3 x^{4}$

$6 x^{3}$

$4 x^{4}$

$9 x^{3}$

$11 x^{2}$

Step 10

Multiply the new quotient term by the divisor.

$3 x^{3}$

$4 x^{2}$

$x^{2}$

$x$

$2$

$3 x^{5}$

$7 x^{4}$

$15 x^{3}$

$11 x^{2}$

$8 x$

$4$

$3 x^{5}$

$3 x^{4}$

$6 x^{3}$

$4 x^{4}$

$9 x^{3}$

$11 x^{2}$

$4 x^{4}$

$4 x^{3}$

$8 x^{2}$

Step 11

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

$3 x^{3}$

$4 x^{2}$

$x^{2}$

$x$

$2$

$3 x^{5}$

$7 x^{4}$

$15 x^{3}$

$11 x^{2}$

$8 x$

$4$

$3 x^{5}$

$3 x^{4}$

$6 x^{3}$

$4 x^{4}$

$9 x^{3}$

$11 x^{2}$

$4 x^{4}$

$4 x^{3}$

$8 x^{2}$

Step 12

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

$3 x^{3}$

$4 x^{2}$

$x^{2}$

$x$

$2$

$3 x^{5}$

$7 x^{4}$

$15 x^{3}$

$11 x^{2}$

$8 x$

$4$

$3 x^{5}$

$3 x^{4}$

$6 x^{3}$

$4 x^{4}$

$9 x^{3}$

$11 x^{2}$

$4 x^{4}$

$4 x^{3}$

$8 x^{2}$

$5 x^{3}$

$3 x^{2}$

Step 13

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

$3 x^{3}$

$4 x^{2}$

$x^{2}$

$x$

$2$

$3 x^{5}$

$7 x^{4}$

$15 x^{3}$

$11 x^{2}$

$8 x$

$4$

$3 x^{5}$

$3 x^{4}$

$6 x^{3}$

$4 x^{4}$

$9 x^{3}$

$11 x^{2}$

$4 x^{4}$

$4 x^{3}$

$8 x^{2}$

$5 x^{3}$

$3 x^{2}$

$8 x$

Step 14

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

$3 x^{3}$

$4 x^{2}$

$5 x$

$x^{2}$

$x$

$2$

$3 x^{5}$

$7 x^{4}$

$15 x^{3}$

$11 x^{2}$

$8 x$

$4$

$3 x^{5}$

$3 x^{4}$

$6 x^{3}$

$4 x^{4}$

$9 x^{3}$

$11 x^{2}$

$4 x^{4}$

$4 x^{3}$

$8 x^{2}$

$5 x^{3}$

$3 x^{2}$

$8 x$

Step 15

Multiply the new quotient term by the divisor.

$3 x^{3}$

$4 x^{2}$

$5 x$

$x^{2}$

$x$

$2$

$3 x^{5}$

$7 x^{4}$

$15 x^{3}$

$11 x^{2}$

$8 x$

$4$

$3 x^{5}$

$3 x^{4}$

$6 x^{3}$

$4 x^{4}$

$9 x^{3}$

$11 x^{2}$

$4 x^{4}$

$4 x^{3}$

$8 x^{2}$

$5 x^{3}$

$3 x^{2}$

$8 x$

$5 x^{3}$

$5 x^{2}$

$10 x$

Step 16

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

$3 x^{3}$

$4 x^{2}$

$5 x$

$x^{2}$

$x$

$2$

$3 x^{5}$

$7 x^{4}$

$15 x^{3}$

$11 x^{2}$

$8 x$

$4$

$3 x^{5}$

$3 x^{4}$

$6 x^{3}$

$4 x^{4}$

$9 x^{3}$

$11 x^{2}$

$4 x^{4}$

$4 x^{3}$

$8 x^{2}$

$5 x^{3}$

$3 x^{2}$

$8 x$

$5 x^{3}$

$5 x^{2}$

$10 x$

Step 17

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

$3 x^{3}$

$4 x^{2}$

$5 x$

$x^{2}$

$x$

$2$

$3 x^{5}$

$7 x^{4}$

$15 x^{3}$

$11 x^{2}$

$8 x$

$4$

$3 x^{5}$

$3 x^{4}$

$6 x^{3}$

$4 x^{4}$

$9 x^{3}$

$11 x^{2}$

$4 x^{4}$

$4 x^{3}$

$8 x^{2}$

$5 x^{3}$

$3 x^{2}$

$8 x$

$5 x^{3}$

$5 x^{2}$

$10 x$

$2 x^{2}$

$2 x$

Step 18

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

$3 x^{3}$

$4 x^{2}$

$5 x$

$x^{2}$

$x$

$2$

$3 x^{5}$

$7 x^{4}$

$15 x^{3}$

$11 x^{2}$

$8 x$

$4$

$3 x^{5}$

$3 x^{4}$

$6 x^{3}$

$4 x^{4}$

$9 x^{3}$

$11 x^{2}$

$4 x^{4}$

$4 x^{3}$

$8 x^{2}$

$5 x^{3}$

$3 x^{2}$

$8 x$

$5 x^{3}$

$5 x^{2}$

$10 x$

$2 x^{2}$

$2 x$

$4$

Step 19

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

$3 x^{3}$

$4 x^{2}$

$5 x$

$2$

$x^{2}$

$x$

$2$

$3 x^{5}$

$7 x^{4}$

$15 x^{3}$

$11 x^{2}$

$8 x$

$4$

$3 x^{5}$

$3 x^{4}$

$6 x^{3}$

$4 x^{4}$

$9 x^{3}$

$11 x^{2}$

$4 x^{4}$

$4 x^{3}$

$8 x^{2}$

$5 x^{3}$

$3 x^{2}$

$8 x$

$5 x^{3}$

$5 x^{2}$

$10 x$

$2 x^{2}$

$2 x$

$4$

Step 20

Multiply the new quotient term by the divisor.

$3 x^{3}$

$4 x^{2}$

$5 x$

$2$

$x^{2}$

$x$

$2$

$3 x^{5}$

$7 x^{4}$

$15 x^{3}$

$11 x^{2}$

$8 x$

$4$

$3 x^{5}$

$3 x^{4}$

$6 x^{3}$

$4 x^{4}$

$9 x^{3}$

$11 x^{2}$

$4 x^{4}$

$4 x^{3}$

$8 x^{2}$

$5 x^{3}$

$3 x^{2}$

$8 x$

$5 x^{3}$

$5 x^{2}$

$10 x$

$2 x^{2}$

$2 x$

$4$

$2 x^{2}$

$2 x$

$4$

Step 21

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

$3 x^{3}$

$4 x^{2}$

$5 x$

$2$

$x^{2}$

$x$

$2$

$3 x^{5}$

$7 x^{4}$

$15 x^{3}$

$11 x^{2}$

$8 x$

$4$

$3 x^{5}$

$3 x^{4}$

$6 x^{3}$

$4 x^{4}$

$9 x^{3}$

$11 x^{2}$

$4 x^{4}$

$4 x^{3}$

$8 x^{2}$

$5 x^{3}$

$3 x^{2}$

$8 x$

$5 x^{3}$

$5 x^{2}$

$10 x$

$2 x^{2}$

$2 x$

$4$

$2 x^{2}$

$2 x$

$4$

Step 22

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

$3 x^{3}$

$4 x^{2}$

$5 x$

$2$

$x^{2}$

$x$

$2$

$3 x^{5}$

$7 x^{4}$

$15 x^{3}$

$11 x^{2}$

$8 x$

$4$

$3 x^{5}$

$3 x^{4}$

$6 x^{3}$

$4 x^{4}$

$9 x^{3}$

$11 x^{2}$

$4 x^{4}$

$4 x^{3}$

$8 x^{2}$

$5 x^{3}$

$3 x^{2}$

$8 x$

$5 x^{3}$

$5 x^{2}$

$10 x$

$2 x^{2}$

$2 x$

$4$

$2 x^{2}$

$2 x$

$4$

$0$

Step 23

Since the remander is $0$ , the final answer is the quotient.

$3 x^{3} + 4 x^{2} + 5 x - 2$