Simplify 9/(x^2)+9/(x^3)

$\frac{9}{x^{2}} + \frac{9}{x^{3}}$

To write $\frac{9}{x^{2}}$ as a fraction with a common denominator, multiply by $\frac{x}{x}$ .

$\frac{9}{x^{2}} \cdot \frac{x}{x} + \frac{9}{x^{3}}$

Write each expression with a common denominator of $x^{3}$ , by multiplying each by an appropriate factor of $1$ .

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Multiply $\frac{9}{x^{2}}$ and $\frac{x}{x}$ .

$\frac{9 x}{x^{2} x} + \frac{9}{x^{3}}$

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

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

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

$\frac{9 x}{x^{2} x^{1}} + \frac{9}{x^{3}}$

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

$\frac{9 x}{x^{2 + 1}} + \frac{9}{x^{3}}$

Add $2$ and $1$ .

$\frac{9 x}{x^{3}} + \frac{9}{x^{3}}$

Combine the numerators over the common denominator.

$\frac{9 x + 9}{x^{3}}$

Factor $9$ out of $9 x + 9$ .

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Factor $9$ out of $9 x$ .

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

Factor $9$ out of $9$ .

$\frac{9 (x) + 9 (1)}{x^{3}}$

Factor $9$ out of $9 (x) + 9 (1)$ .

$\frac{9 (x + 1)}{x^{3}}$

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