Solve -21=16k^3 - ScanMath

Evaluate

- 21 = 16 k^{3}

Swap the sides of the equation

16 k^{3} = - 21

Divide both sides

\frac{16 k ^{3}}{16} = \frac{- 21}{16}

Divide the numbers

k^{3} = \frac{- 21}{16}

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

k^{3} = - \frac{21}{16}

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

3 k^{3} = 3 - \frac{21}{16}

Calculate

k = 3 - \frac{21}{16}

Solution

More Steps

k = - \frac{3 84}{4}

Alternative Form

k \approx - 1.09488

Solve the equation