Solve r^321-1 - ScanMath

Evaluate

r^{3} \times 21 - 1

To find the roots of the expression,set the expression equal to 0

r^{3} \times 21 - 1 = 0

Use the commutative property to reorder the terms

21 r^{3} - 1 = 0

Move the constant to the right-hand side and change its sign

21 r^{3} = 0 + 1

Removing 0 doesn't change the value,so remove it from the expression

21 r^{3} = 1

Divide both sides

\frac{21 r ^{3}}{21} = \frac{1}{21}

Divide the numbers

r^{3} = \frac{1}{21}

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

3 r^{3} = 3 \frac{1}{21}

Calculate

r = 3 \frac{1}{21}

Solution

More Steps

r = \frac{3 441}{21}

Alternative Form

r \approx 0.36246

Simplify the expression