Pre-Algebra Examples

$\frac{x^{5} + 5 x^{4} + 8 x^{3} + 4 x^{3}}{x^{5} + x^{4} + 8 x^{2} + 8 x}$

Step 1

Add $8 x^{3}$ and $4 x^{3}$ .

$\frac{x^{5} + 5 x^{4} + 12 x^{3}}{x^{5} + x^{4} + 8 x^{2} + 8 x}$

Step 2

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

$x^{5}$

$x^{4}$

$0 x^{3}$

$8 x^{2}$

$8 x$

$0$

$x^{5}$

$5 x^{4}$

$12 x^{3}$

$0 x^{2}$

$0 x$

$0$

Step 3

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

$1$

$x^{5}$

$x^{4}$

$0 x^{3}$

$8 x^{2}$

$8 x$

$0$

$x^{5}$

$5 x^{4}$

$12 x^{3}$

$0 x^{2}$

$0 x$

$0$

Step 4

Multiply the new quotient term by the divisor.

$1$

$x^{5}$

$x^{4}$

$0 x^{3}$

$8 x^{2}$

$8 x$

$0$

$x^{5}$

$5 x^{4}$

$12 x^{3}$

$0 x^{2}$

$0 x$

$0$

$x^{5}$

$x^{4}$

$0$

$8 x^{2}$

$8 x$

$0$

Step 5

The expression needs to be subtracted from the dividend, so change all the signs in $x^{5} + x^{4} + 0 + 8 x^{2} + 8 x + 0$

$1$

$x^{5}$

$x^{4}$

$0 x^{3}$

$8 x^{2}$

$8 x$

$0$

$x^{5}$

$5 x^{4}$

$12 x^{3}$

$0 x^{2}$

$0 x$

$0$

$x^{5}$

$x^{4}$

$0$

$8 x^{2}$

$8 x$

$0$

Step 6

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

$1$

$x^{5}$

$x^{4}$

$0 x^{3}$

$8 x^{2}$

$8 x$

$0$

$x^{5}$

$5 x^{4}$

$12 x^{3}$

$0 x^{2}$

$0 x$

$0$

$x^{5}$

$x^{4}$

$0$

$8 x^{2}$

$8 x$

$0$

$4 x^{4}$

$12 x^{3}$

$8 x^{2}$

$8 x$

$0$

Step 7

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

$1 + \frac{4 x^{4} + 12 x^{3} - 8 x^{2} - 8 x}{x^{5} + x^{4} + 8 x^{2} + 8 x}$