Solve x^28x = -15

Evaluate

x^{2} \times 8 x = - 15

Multiply

More Steps

8 x^{3} = - 15

Divide both sides

\frac{8 x ^{3}}{8} = \frac{- 15}{8}

Divide the numbers

x^{3} = \frac{- 15}{8}

Use \frac{- a}{b} = \frac{a}{- b} = - \frac{a}{b} to rewrite the fraction

x^{3} = - \frac{15}{8}

Take the 3 -th root on both sides of the equation

3 x^{3} = 3 - \frac{15}{8}

Calculate

x = 3 - \frac{15}{8}

Solution

More Steps

x = - \frac{3 15}{2}

Alternative Form

x \approx - 1.233106

Solve the equation