Simplify ((x^2-16)/(x^3-6x^2+8x)*(2-x)/(x^2-100))÷((x^2+12x+32)/(x^2+18x+80))

$\frac{x^{2} - 16}{x^{3} - 6 x^{2} + 8 x} \cdot \frac{2 - x}{x^{2} - 100} \div \frac{x^{2} + 12 x + 32}{x^{2} + 18 x + 80}$

Step 1

To divide by a fraction, multiply by its reciprocal.

$\frac{x^{2} - 16}{x^{3} - 6 x^{2} + 8 x} \cdot \frac{2 - x}{x^{2} - 100} \frac{x^{2} + 18 x + 80}{x^{2} + 12 x + 32}$

Step 2

Simplify the numerator.

Rewrite $16$ as $4^{2}$ .

$\frac{x^{2} - 4^{2}}{x^{3} - 6 x^{2} + 8 x} \cdot \frac{2 - x}{x^{2} - 100} \frac{x^{2} + 18 x + 80}{x^{2} + 12 x + 32}$

Since both terms are perfect squares, factor using the difference of squares formula, $a^{2} - b^{2} = (a + b) (a - b)$ where $a = x$ and $b = 4$ .

$\frac{(x + 4) (x - 4)}{x^{3} - 6 x^{2} + 8 x} \cdot \frac{2 - x}{x^{2} - 100} \frac{x^{2} + 18 x + 80}{x^{2} + 12 x + 32}$

Step 3

Simplify the denominator.

Factor $x$ out of $x^{3} - 6 x^{2} + 8 x$ .

Factor $x$ out of $x^{3}$ .

$\frac{(x + 4) (x - 4)}{x \cdot x^{2} - 6 x^{2} + 8 x} \cdot \frac{2 - x}{x^{2} - 100} \frac{x^{2} + 18 x + 80}{x^{2} + 12 x + 32}$

Factor $x$ out of $- 6 x^{2}$ .

$\frac{(x + 4) (x - 4)}{x \cdot x^{2} + x (- 6 x) + 8 x} \cdot \frac{2 - x}{x^{2} - 100} \frac{x^{2} + 18 x + 80}{x^{2} + 12 x + 32}$

Factor $x$ out of $8 x$ .

$\frac{(x + 4) (x - 4)}{x \cdot x^{2} + x (- 6 x) + x \cdot 8} \cdot \frac{2 - x}{x^{2} - 100} \frac{x^{2} + 18 x + 80}{x^{2} + 12 x + 32}$

Factor $x$ out of $x \cdot x^{2} + x (- 6 x)$ .

$\frac{(x + 4) (x - 4)}{x (x^{2} - 6 x) + x \cdot 8} \cdot \frac{2 - x}{x^{2} - 100} \frac{x^{2} + 18 x + 80}{x^{2} + 12 x + 32}$

Factor $x$ out of $x (x^{2} - 6 x) + x \cdot 8$ .

$\frac{(x + 4) (x - 4)}{x (x^{2} - 6 x + 8)} \cdot \frac{2 - x}{x^{2} - 100} \frac{x^{2} + 18 x + 80}{x^{2} + 12 x + 32}$

Factor $x^{2} - 6 x + 8$ using the AC method.

Consider the form $x^{2} + b x + c$ . Find a pair of integers whose product is $c$ and whose sum is $b$ . In this case, whose product is $8$ and whose sum is $- 6$ .

$- 4, - 2$

Write the factored form using these integers.

$\frac{(x + 4) (x - 4)}{x ((x - 4) (x - 2))} \cdot \frac{2 - x}{x^{2} - 100} \frac{x^{2} + 18 x + 80}{x^{2} + 12 x + 32}$

$\frac{(x + 4) (x - 4)}{x (x - 4) (x - 2)} \cdot \frac{2 - x}{x^{2} - 100} \frac{x^{2} + 18 x + 80}{x^{2} + 12 x + 32}$

Step 4

Simplify the denominator.

Rewrite $100$ as $10^{2}$ .

$\frac{(x + 4) (x - 4)}{x (x - 4) (x - 2)} \cdot \frac{2 - x}{x^{2} - 10^{2}} \frac{x^{2} + 18 x + 80}{x^{2} + 12 x + 32}$

Since both terms are perfect squares, factor using the difference of squares formula, $a^{2} - b^{2} = (a + b) (a - b)$ where $a = x$ and $b = 10$ .

$\frac{(x + 4) (x - 4)}{x (x - 4) (x - 2)} \cdot \frac{2 - x}{(x + 10) (x - 10)} \frac{x^{2} + 18 x + 80}{x^{2} + 12 x + 32}$

Step 5

Simplify terms.

Cancel the common factor of $x - 4$ .

Cancel the common factor.

$\frac{(x + 4) (x - 4)}{x (x - 4) (x - 2)} \cdot \frac{2 - x}{(x + 10) (x - 10)} \frac{x^{2} + 18 x + 80}{x^{2} + 12 x + 32}$

Rewrite the expression.

$\frac{x + 4}{x (x - 2)} \cdot \frac{2 - x}{(x + 10) (x - 10)} \frac{x^{2} + 18 x + 80}{x^{2} + 12 x + 32}$

Multiply $\frac{x + 4}{x (x - 2)}$ by $\frac{2 - x}{(x + 10) (x - 10)}$ .

$\frac{(x + 4) (2 - x)}{x (x - 2) ((x + 10) (x - 10))} \cdot \frac{x^{2} + 18 x + 80}{x^{2} + 12 x + 32}$

Cancel the common factor of $2 - x$ and $x - 2$ .

Rewrite $2$ as $- 1 (- 2)$ .

$\frac{(x + 4) (- 1 (- 2) - x)}{x (x - 2) ((x + 10) (x - 10))} \cdot \frac{x^{2} + 18 x + 80}{x^{2} + 12 x + 32}$

Factor $- 1$ out of $- x$ .

$\frac{(x + 4) (- 1 (- 2) - (x))}{x (x - 2) ((x + 10) (x - 10))} \cdot \frac{x^{2} + 18 x + 80}{x^{2} + 12 x + 32}$

Factor $- 1$ out of $- 1 (- 2) - (x)$ .

$\frac{(x + 4) (- 1 (- 2 + x))}{x (x - 2) ((x + 10) (x - 10))} \cdot \frac{x^{2} + 18 x + 80}{x^{2} + 12 x + 32}$

Reorder terms.

$\frac{(x + 4) (- 1 (x - 2))}{x (x - 2) ((x + 10) (x - 10))} \cdot \frac{x^{2} + 18 x + 80}{x^{2} + 12 x + 32}$

Cancel the common factor.

$\frac{(x + 4) (- 1 (x - 2))}{x (x - 2) ((x + 10) (x - 10))} \cdot \frac{x^{2} + 18 x + 80}{x^{2} + 12 x + 32}$

Rewrite the expression.

$\frac{(x + 4) \cdot (- 1)}{x ((x + 10) (x - 10))} \cdot \frac{x^{2} + 18 x + 80}{x^{2} + 12 x + 32}$

Step 6

Simplify the denominator.

Rewrite.

$\frac{(x + 4) \cdot - 1}{x (x - 2) ((x + 10) (x - 10))} \cdot \frac{x^{2} + 18 x + 80}{x^{2} + 12 x + 32}$

Rewrite.

$\frac{(x + 4) \cdot - 1}{x^{1} ((x + 10) (x - 10))} \cdot \frac{x^{2} + 18 x + 80}{x^{2} + 12 x + 32}$

Simplify.

$\frac{(x + 4) \cdot - 1}{x ((x + 10) (x - 10))} \cdot \frac{x^{2} + 18 x + 80}{x^{2} + 12 x + 32}$

Remove unnecessary parentheses.

$\frac{(x + 4) \cdot - 1}{x (x + 10) (x - 10)} \cdot \frac{x^{2} + 18 x + 80}{x^{2} + 12 x + 32}$

Step 7

Simplify the expression.

Move $- 1$ to the left of $x + 4$ .

$\frac{- 1 \cdot (x + 4)}{x (x + 10) (x - 10)} \cdot \frac{x^{2} + 18 x + 80}{x^{2} + 12 x + 32}$

Move the negative in front of the fraction.

$- \frac{x + 4}{x (x + 10) (x - 10)} \cdot \frac{x^{2} + 18 x + 80}{x^{2} + 12 x + 32}$

Step 8

Factor $x^{2} + 18 x + 80$ using the AC method.

Consider the form $x^{2} + b x + c$ . Find a pair of integers whose product is $c$ and whose sum is $b$ . In this case, whose product is $80$ and whose sum is $18$ .

$8, 10$

Write the factored form using these integers.

$- \frac{x + 4}{x (x + 10) (x - 10)} \cdot \frac{(x + 8) (x + 10)}{x^{2} + 12 x + 32}$

Step 9

Factor $x^{2} + 12 x + 32$ using the AC method.

Consider the form $x^{2} + b x + c$ . Find a pair of integers whose product is $c$ and whose sum is $b$ . In this case, whose product is $32$ and whose sum is $12$ .

$4, 8$

Write the factored form using these integers.

$- \frac{x + 4}{x (x + 10) (x - 10)} \cdot \frac{(x + 8) (x + 10)}{(x + 4) (x + 8)}$

Step 10

Simplify terms.

Cancel the common factor of $x + 4$ .

Move the leading negative in $- \frac{x + 4}{x (x + 10) (x - 10)}$ into the numerator.

$\frac{- (x + 4)}{x (x + 10) (x - 10)} \cdot \frac{(x + 8) (x + 10)}{(x + 4) (x + 8)}$

Factor $x + 4$ out of $- (x + 4)$ .

$\frac{(x + 4) \cdot - 1}{x (x + 10) (x - 10)} \cdot \frac{(x + 8) (x + 10)}{(x + 4) (x + 8)}$

Cancel the common factor.

$\frac{(x + 4) \cdot - 1}{x (x + 10) (x - 10)} \cdot \frac{(x + 8) (x + 10)}{(x + 4) (x + 8)}$

Rewrite the expression.

$\frac{- 1}{x (x + 10) (x - 10)} \cdot \frac{(x + 8) (x + 10)}{x + 8}$

Cancel the common factor of $x + 10$ .

Factor $x + 10$ out of $x (x + 10) (x - 10)$ .

$\frac{- 1}{(x + 10) (x (x - 10))} \cdot \frac{(x + 8) (x + 10)}{x + 8}$

Factor $x + 10$ out of $(x + 8) (x + 10)$ .

$\frac{- 1}{(x + 10) (x (x - 10))} \cdot \frac{(x + 10) (x + 8)}{x + 8}$

Cancel the common factor.

$\frac{- 1}{(x + 10) (x (x - 10))} \cdot \frac{(x + 10) (x + 8)}{x + 8}$

Rewrite the expression.

$\frac{- 1}{x (x - 10)} \cdot \frac{x + 8}{x + 8}$

Multiply $\frac{- 1}{x (x - 10)}$ by $\frac{x + 8}{x + 8}$ .

$\frac{- (x + 8)}{x (x - 10) (x + 8)}$

Cancel the common factor of $x + 8$ .

Cancel the common factor.

$\frac{- (x + 8)}{x (x - 10) (x + 8)}$

Rewrite the expression.

$\frac{- 1}{x (x - 10)}$

Move the negative in front of the fraction.

$- \frac{1}{x (x - 10)}$

Simplify ((x^2-16)/(x^3-6x^2+8x)*(2-x)/(x^2-100))÷((x^2+12x+32)/(x^2+18x+80))

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