Simplify ((x+1)/(x+4)-1/x)/(x+1)

$\frac{\frac{x + 1}{x + 4} - \frac{1}{x}}{x + 1}$

Multiply the numerator and denominator of the complex fraction by $(x + 4) x$ .

Multiply $\frac{\frac{x + 1}{x + 4} - \frac{1}{x}}{x + 1}$ by $\frac{(x + 4) x}{(x + 4) x}$ .

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

Combine.

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

Apply the distributive property.

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

Simplify by cancelling.

Cancel the common factor of $x + 4$ .

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

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

Cancel the common factor.

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

Rewrite the expression.

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

Cancel the common factor of $x$ .

Move the leading negative in $- \frac{1}{x}$ into the numerator.

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

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

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

Cancel the common factor.

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

Rewrite the expression.

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

Simplify the numerator.

Apply the distributive property.

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

Multiply $x$ by $x$ .

$\frac{x^{2} + x \cdot 1 + (x + 4) \cdot - 1}{(x + 4) x \cdot x + (x + 4) x \cdot 1}$

Multiply $x$ by $1$ .

$\frac{x^{2} + x + (x + 4) \cdot - 1}{(x + 4) x \cdot x + (x + 4) x \cdot 1}$

Apply the distributive property.

$\frac{x^{2} + x + x \cdot - 1 + 4 \cdot - 1}{(x + 4) x \cdot x + (x + 4) x \cdot 1}$

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

$\frac{x^{2} + x - 1 \cdot x + 4 \cdot - 1}{(x + 4) x \cdot x + (x + 4) x \cdot 1}$

Multiply $4$ by $- 1$ .

$\frac{x^{2} + x - 1 \cdot x - 4}{(x + 4) x \cdot x + (x + 4) x \cdot 1}$

Rewrite $- 1 x$ as $- x$ .

$\frac{x^{2} + x - x - 4}{(x + 4) x \cdot x + (x + 4) x \cdot 1}$

Subtract $x$ from $x$ .

$\frac{x^{2} + 0 - 4}{(x + 4) x \cdot x + (x + 4) x \cdot 1}$

Add $x^{2}$ and $0$ .

$\frac{x^{2} - 4}{(x + 4) x \cdot x + (x + 4) x \cdot 1}$

Rewrite $x^{2} - 4$ in a factored form.

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

$\frac{x^{2} - 2^{2}}{(x + 4) x \cdot x + (x + 4) x \cdot 1}$

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 $b = 2$ .

$\frac{(x + 2) (x - 2)}{(x + 4) x \cdot x + (x + 4) x \cdot 1}$

Simplify the denominator.

Multiply $x$ by $x$ by adding the exponents.

Move $x$ .

$\frac{(x + 2) (x - 2)}{(x + 4) (x \cdot x) + (x + 4) x \cdot 1}$

Multiply $x$ by $x$ .

$\frac{(x + 2) (x - 2)}{(x + 4) x^{2} + (x + 4) x \cdot 1}$

Apply the distributive property.

$\frac{(x + 2) (x - 2)}{x \cdot x^{2} + 4 x^{2} + (x + 4) x \cdot 1}$

Multiply $x$ by $x^{2}$ by adding the exponents.

Multiply $x$ by $x^{2}$ .

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

$\frac{(x + 2) (x - 2)}{x^{1} x^{2} + 4 x^{2} + (x + 4) x \cdot 1}$

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

$\frac{(x + 2) (x - 2)}{x^{1 + 2} + 4 x^{2} + (x + 4) x \cdot 1}$

Add $1$ and $2$ .

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

Apply the distributive property.

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

Multiply $x$ by $x$ .

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

Multiply $x^{2} + 4 x$ by $1$ .

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

Add $4 x^{2}$ and $x^{2}$ .

$\frac{(x + 2) (x - 2)}{x^{3} + 5 x^{2} + 4 x}$

Rewrite $x^{3} + 5 x^{2} + 4 x$ in a factored form.

Factor $x$ out of $x^{3} + 5 x^{2} + 4 x$ .

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

$\frac{(x + 2) (x - 2)}{x \cdot x^{2} + 5 x^{2} + 4 x}$

Factor $x$ out of $5 x^{2}$ .

$\frac{(x + 2) (x - 2)}{x \cdot x^{2} + x (5 x) + 4 x}$

Factor $x$ out of $4 x$ .

$\frac{(x + 2) (x - 2)}{x \cdot x^{2} + x (5 x) + x \cdot 4}$

Factor $x$ out of $x \cdot x^{2} + x (5 x)$ .

$\frac{(x + 2) (x - 2)}{x (x^{2} + 5 x) + x \cdot 4}$

Factor $x$ out of $x (x^{2} + 5 x) + x \cdot 4$ .

$\frac{(x + 2) (x - 2)}{x (x^{2} + 5 x + 4)}$

Factor $x^{2} + 5 x + 4$ 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 $4$ and whose sum is $5$ .

$1, 4$

Write the factored form using these integers.

$\frac{(x + 2) (x - 2)}{x ((x + 1) (x + 4))}$

$\frac{(x + 2) (x - 2)}{x (x + 1) (x + 4)}$

Simplify ((x+1)/(x+4)-1/x)/(x+1)

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