Precalculus Examples

$f (x) = x^{3} - 4$

Step 1

Set $x^{3} - 4$ equal to $0$ .

$x^{3} - 4 = 0$

Step 2

Solve for $x$ .

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Step 2.1

Add $4$ to both sides of the equation.

$x^{3} = 4$

Step 2.2

Take the specified root of both sides of the equation to eliminate the exponent on the left side.

$x = \sqrt[3]{4}$

Step 3

The result can be shown in multiple forms.

Exact Form:

$x = \sqrt[3]{4}$

Decimal Form:

$x = 1.58740105 \dots$

Step 4