Precalculus Examples

$\frac{x^{2} (7 + x) (x - 9)}{(x + 3) (x - 2)}$

Step 1

Expand $x^{2} (7 + x) (x - 9)$ .

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Step 1.1

Apply the distributive property.

$\frac{(x^{2} \cdot 7 + x^{2} x) (x - 9)}{(x + 3) (x - 2)}$

Step 1.2

Apply the distributive property.

$\frac{x^{2} \cdot (7 (x - 9)) + x^{2} x (x - 9)}{(x + 3) (x - 2)}$

Step 1.3

Apply the distributive property.

$\frac{x^{2} \cdot (7 x) + x^{2} \cdot 7 \cdot - 9 + x^{2} x (x - 9)}{(x + 3) (x - 2)}$

Step 1.4

Apply the distributive property.

$\frac{x^{2} \cdot (7 x) + x^{2} \cdot 7 \cdot - 9 + x^{2} x \cdot x + x^{2} x \cdot - 9}{(x + 3) (x - 2)}$

Step 1.5

Reorder $x^{2}$ and $7$ .

$\frac{7 \cdot (x^{2} x) + x^{2} \cdot 7 \cdot - 9 + x^{2} x \cdot x + x^{2} x \cdot - 9}{(x + 3) (x - 2)}$

Step 1.6

Reorder $x^{2}$ and $7$ .

$\frac{7 \cdot (x^{2} x) + 7 \cdot x^{2} \cdot - 9 + x^{2} x \cdot x + x^{2} x \cdot - 9}{(x + 3) (x - 2)}$

Step 1.7

Move $x^{2}$ .

$\frac{7 \cdot (x^{2} x) + 7 \cdot (- 9 x^{2}) + x^{2} x \cdot x + x^{2} x \cdot - 9}{(x + 3) (x - 2)}$

Step 1.8

Move $x$ .

$\frac{7 \cdot (x^{2} x) + 7 \cdot (- 9 x^{2}) + x^{2} x \cdot x + x^{2} \cdot (- 9 x)}{(x + 3) (x - 2)}$

Step 1.9

Reorder $x^{2}$ and $- 9$ .

$\frac{7 x^{2} x + 7 \cdot (- 9 x^{2}) + x^{2} x \cdot x - 9 x^{2} x}{(x + 3) (x - 2)}$

Step 1.10

Raise $x$ to the power of $1$ .

$\frac{7 (x^{2} x) + 7 \cdot (- 9 x^{2}) + x^{2} x \cdot x - 9 x^{2} x}{(x + 3) (x - 2)}$

Step 1.11

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$\frac{7 x^{2 + 1} + 7 \cdot (- 9 x^{2}) + x^{2} x \cdot x - 9 x^{2} x}{(x + 3) (x - 2)}$

Step 1.12

Add $2$ and $1$ .

$\frac{7 x^{3} + 7 \cdot (- 9 x^{2}) + x^{2} x \cdot x - 9 x^{2} x}{(x + 3) (x - 2)}$

Step 1.13

Multiply $7$ by $- 9$ .

$\frac{7 x^{3} - 63 x^{2} + x^{2} x \cdot x - 9 x^{2} x}{(x + 3) (x - 2)}$

Step 1.14

Raise $x$ to the power of $1$ .

$\frac{7 x^{3} - 63 x^{2} + x^{2} x \cdot x - 9 x^{2} x}{(x + 3) (x - 2)}$

Step 1.15

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$\frac{7 x^{3} - 63 x^{2} + x^{2 + 1} x - 9 x^{2} x}{(x + 3) (x - 2)}$

Step 1.16

Add $2$ and $1$ .

$\frac{7 x^{3} - 63 x^{2} + x^{3} x - 9 x^{2} x}{(x + 3) (x - 2)}$

Step 1.17

Raise $x$ to the power of $1$ .

$\frac{7 x^{3} - 63 x^{2} + x^{3} x - 9 x^{2} x}{(x + 3) (x - 2)}$

Step 1.18

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$\frac{7 x^{3} - 63 x^{2} + x^{3 + 1} - 9 x^{2} x}{(x + 3) (x - 2)}$

Step 1.19

Add $3$ and $1$ .

$\frac{7 x^{3} - 63 x^{2} + x^{4} - 9 x^{2} x}{(x + 3) (x - 2)}$

Step 1.20

Raise $x$ to the power of $1$ .

$\frac{7 x^{3} - 63 x^{2} + x^{4} - 9 (x^{2} x)}{(x + 3) (x - 2)}$

Step 1.21

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$\frac{7 x^{3} - 63 x^{2} + x^{4} - 9 x^{2 + 1}}{(x + 3) (x - 2)}$

Step 1.22

Add $2$ and $1$ .

$\frac{7 x^{3} - 63 x^{2} + x^{4} - 9 x^{3}}{(x + 3) (x - 2)}$

Step 1.23

Move $- 63 x^{2}$ .

$\frac{7 x^{3} + x^{4} - 9 x^{3} - 63 x^{2}}{(x + 3) (x - 2)}$

Step 1.24

Reorder $7 x^{3}$ and $x^{4}$ .

$\frac{x^{4} + 7 x^{3} - 9 x^{3} - 63 x^{2}}{(x + 3) (x - 2)}$

Step 1.25

Subtract $9 x^{3}$ from $7 x^{3}$ .

$\frac{x^{4} - 2 x^{3} - 63 x^{2}}{(x + 3) (x - 2)}$

Step 2

Expand $(x + 3) (x - 2)$ .

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Step 2.1

Apply the distributive property.

$\frac{x^{4} - 2 x^{3} - 63 x^{2}}{x (x - 2) + 3 (x - 2)}$

Step 2.2

Apply the distributive property.

$\frac{x^{4} - 2 x^{3} - 63 x^{2}}{x \cdot x + x \cdot - 2 + 3 (x - 2)}$

Step 2.3

Apply the distributive property.

$\frac{x^{4} - 2 x^{3} - 63 x^{2}}{x \cdot x + x \cdot - 2 + 3 x + 3 \cdot - 2}$

Step 2.4

Reorder $x$ and $- 2$ .

$\frac{x^{4} - 2 x^{3} - 63 x^{2}}{x \cdot x - 2 x + 3 x + 3 \cdot - 2}$

Step 2.5

Raise $x$ to the power of $1$ .

$\frac{x^{4} - 2 x^{3} - 63 x^{2}}{x \cdot x - 2 x + 3 x + 3 \cdot - 2}$

Step 2.6

Raise $x$ to the power of $1$ .

$\frac{x^{4} - 2 x^{3} - 63 x^{2}}{x \cdot x - 2 x + 3 x + 3 \cdot - 2}$

Step 2.7

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$\frac{x^{4} - 2 x^{3} - 63 x^{2}}{x^{1 + 1} - 2 x + 3 x + 3 \cdot - 2}$

Step 2.8

Add $1$ and $1$ .

$\frac{x^{4} - 2 x^{3} - 63 x^{2}}{x^{2} - 2 x + 3 x + 3 \cdot - 2}$

Step 2.9

Multiply $3$ by $- 2$ .

$\frac{x^{4} - 2 x^{3} - 63 x^{2}}{x^{2} - 2 x + 3 x - 6}$

Step 2.10

Add $- 2 x$ and $3 x$ .

$\frac{x^{4} - 2 x^{3} - 63 x^{2}}{x^{2} + x - 6}$

Step 3

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

$x^{2}$

$x$

$6$

$x^{4}$

$2 x^{3}$

$63 x^{2}$

$0 x$

$0$

Step 4

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

$x^{2}$

$x$

$6$

$x^{4}$

$2 x^{3}$

$63 x^{2}$

$0 x$

$0$

Step 5

Multiply the new quotient term by the divisor.

$x^{2}$

$x$

$6$

$x^{4}$

$2 x^{3}$

$63 x^{2}$

$0 x$

$0$

$x^{4}$

$x^{3}$

$6 x^{2}$

Step 6

The expression needs to be subtracted from the dividend, so change all the signs in $x^{4} + x^{3} - 6 x^{2}$

$x^{2}$

$x$

$6$

$x^{4}$

$2 x^{3}$

$63 x^{2}$

$0 x$

$0$

$x^{4}$

$x^{3}$

$6 x^{2}$

Step 7

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

$x^{2}$

$x$

$6$

$x^{4}$

$2 x^{3}$

$63 x^{2}$

$0 x$

$0$

$x^{4}$

$x^{3}$

$6 x^{2}$

$3 x^{3}$

$57 x^{2}$

Step 8

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

$x^{2}$

$x$

$6$

$x^{4}$

$2 x^{3}$

$63 x^{2}$

$0 x$

$0$

$x^{4}$

$x^{3}$

$6 x^{2}$

$3 x^{3}$

$57 x^{2}$

$0 x$

Step 9

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

$x^{2}$

$3 x$

$x^{2}$

$x$

$6$

$x^{4}$

$2 x^{3}$

$63 x^{2}$

$0 x$

$0$

$x^{4}$

$x^{3}$

$6 x^{2}$

$3 x^{3}$

$57 x^{2}$

$0 x$

Step 10

Multiply the new quotient term by the divisor.

$x^{2}$

$3 x$

$x^{2}$

$x$

$6$

$x^{4}$

$2 x^{3}$

$63 x^{2}$

$0 x$

$0$

$x^{4}$

$x^{3}$

$6 x^{2}$

$3 x^{3}$

$57 x^{2}$

$0 x$

$3 x^{3}$

$3 x^{2}$

$18 x$

Step 11

The expression needs to be subtracted from the dividend, so change all the signs in $- 3 x^{3} - 3 x^{2} + 18 x$

$x^{2}$

$3 x$

$x^{2}$

$x$

$6$

$x^{4}$

$2 x^{3}$

$63 x^{2}$

$0 x$

$0$

$x^{4}$

$x^{3}$

$6 x^{2}$

$3 x^{3}$

$57 x^{2}$

$0 x$

$3 x^{3}$

$3 x^{2}$

$18 x$

Step 12

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

$x^{2}$

$3 x$

$x^{2}$

$x$

$6$

$x^{4}$

$2 x^{3}$

$63 x^{2}$

$0 x$

$0$

$x^{4}$

$x^{3}$

$6 x^{2}$

$3 x^{3}$

$57 x^{2}$

$0 x$

$3 x^{3}$

$3 x^{2}$

$18 x$

$54 x^{2}$

$18 x$

Step 13

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

$x^{2}$

$3 x$

$x^{2}$

$x$

$6$

$x^{4}$

$2 x^{3}$

$63 x^{2}$

$0 x$

$0$

$x^{4}$

$x^{3}$

$6 x^{2}$

$3 x^{3}$

$57 x^{2}$

$0 x$

$3 x^{3}$

$3 x^{2}$

$18 x$

$54 x^{2}$

$18 x$

$0$

Step 14

Divide the highest order term in the dividend $- 54 x^{2}$ by the highest order term in divisor $x^{2}$ .

$x^{2}$

$3 x$

$54$

$x^{2}$

$x$

$6$

$x^{4}$

$2 x^{3}$

$63 x^{2}$

$0 x$

$0$

$x^{4}$

$x^{3}$

$6 x^{2}$

$3 x^{3}$

$57 x^{2}$

$0 x$

$3 x^{3}$

$3 x^{2}$

$18 x$

$54 x^{2}$

$18 x$

$0$

Step 15

Multiply the new quotient term by the divisor.

$x^{2}$

$3 x$

$54$

$x^{2}$

$x$

$6$

$x^{4}$

$2 x^{3}$

$63 x^{2}$

$0 x$

$0$

$x^{4}$

$x^{3}$

$6 x^{2}$

$3 x^{3}$

$57 x^{2}$

$0 x$

$3 x^{3}$

$3 x^{2}$

$18 x$

$54 x^{2}$

$18 x$

$0$

$54 x^{2}$

$54 x$

$324$

Step 16

The expression needs to be subtracted from the dividend, so change all the signs in $- 54 x^{2} - 54 x + 324$

$x^{2}$

$3 x$

$54$

$x^{2}$

$x$

$6$

$x^{4}$

$2 x^{3}$

$63 x^{2}$

$0 x$

$0$

$x^{4}$

$x^{3}$

$6 x^{2}$

$3 x^{3}$

$57 x^{2}$

$0 x$

$3 x^{3}$

$3 x^{2}$

$18 x$

$54 x^{2}$

$18 x$

$0$

$54 x^{2}$

$54 x$

$324$

Step 17

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

$x^{2}$

$3 x$

$54$

$x^{2}$

$x$

$6$

$x^{4}$

$2 x^{3}$

$63 x^{2}$

$0 x$

$0$

$x^{4}$

$x^{3}$

$6 x^{2}$

$3 x^{3}$

$57 x^{2}$

$0 x$

$3 x^{3}$

$3 x^{2}$

$18 x$

$54 x^{2}$

$18 x$

$0$

$54 x^{2}$

$54 x$

$324$

$36 x$

$324$

Step 18

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

$x^{2} - 3 x - 54 + \frac{36 x - 324}{x^{2} + x - 6}$