Solve 9-5x^2x-8 - ScanMath

Question

Simplify the expression

1 - 5 x^{3}

Evaluate

9 - 5 x^{2} \times x - 8

Multiply

More Steps

Multiply the terms

- 5 x^{2} \times x

Multiply the terms with the same base by adding their exponents

- 5 x^{2 + 1}

Add the numbers

- 5 x^{3}

9 - 5 x^{3} - 8

Solution

1 - 5 x^{3}

Show Solution

x = \frac{3 25}{5}

Alternative Form

x \approx 0.584804

Evaluate

9 - 5 x^{2} \times x - 8

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

9 - 5 x^{2} \times x - 8 = 0

Multiply

More Steps

Multiply the terms

5 x^{2} \times x

Multiply the terms with the same base by adding their exponents

5 x^{2 + 1}

Add the numbers

5 x^{3}

9 - 5 x^{3} - 8 = 0

Subtract the numbers

1 - 5 x^{3} = 0

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

- 5 x^{3} = 0 - 1

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

- 5 x^{3} = - 1

Change the signs on both sides of the equation

5 x^{3} = 1

Divide both sides

\frac{5 x ^{3}}{5} = \frac{1}{5}

Divide the numbers

x^{3} = \frac{1}{5}

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

3 x^{3} = 3 \frac{1}{5}

Calculate

x = 3 \frac{1}{5}

Solution

More Steps

Evaluate

3 \frac{1}{5}

To take a root of a fraction,take the root of the numerator and denominator separately

\frac{3 1}{3 5}

Simplify the radical expression

\frac{1}{3 5}

Multiply by the Conjugate

\frac{3 5 ^{2}}{3 5 \times 3 5 ^{2}}

Simplify

\frac{3 25}{3 5 \times 3 5 ^{2}}

Multiply the numbers

More Steps

Evaluate

35 \times 3 5^{2}

The product of roots with the same index is equal to the root of the product

3 5 \times 5^{2}

Calculate the product

3 5^{3}

Reduce the index of the radical and exponent with 3

5

\frac{3 25}{5}

x = \frac{3 25}{5}

Alternative Form

x \approx 0.584804

Show Solution