Precalculus Examples

$\log (x) + \log (x^{2}) = 3$

Step 1

Simplify $\log (x) + \log (x^{2})$ .

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Step 1.1

Use the product property of logarithms, $\log_{b} (x) + \log_{b} (y) = \log_{b} (x y)$ .

$\log (x \cdot x^{2}) = 3$

Step 1.2

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

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Step 1.2.1

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

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Step 1.2.1.1

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

$\log (x^{1} x^{2}) = 3$

Step 1.2.1.2

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

$\log (x^{1 + 2}) = 3$

Step 1.2.2

Add $1$ and $2$ .

$\log (x^{3}) = 3$

Step 2

Graph each side of the equation. The solution is the x-value of the point of intersection.

$x = 10$

Step 3