Solve x^2 7x 9=-1

Evaluate

x^{2} \times 7 x \times 9 = - 1

Multiply

More Steps

63 x^{3} = - 1

Divide both sides

\frac{63 x ^{3}}{63} = \frac{- 1}{63}

Divide the numbers

x^{3} = \frac{- 1}{63}

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

x^{3} = - \frac{1}{63}

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

3 x^{3} = 3 - \frac{1}{63}

Calculate

x = 3 - \frac{1}{63}

Solution

More Steps

x = - \frac{3 147}{21}

Alternative Form

x \approx - 0.251316

Solve the equation