Solve x^33x-1 - ScanMath

Question

Simplify the expression

3 x^{4} - 1

Evaluate

x^{3} \times 3 x - 1

Solution

More Steps

Evaluate

x^{3} \times 3 x

Multiply the terms with the same base by adding their exponents

x^{3 + 1} \times 3

Add the numbers

x^{4} \times 3

Use the commutative property to reorder the terms

3 x^{4}

3 x^{4} - 1

Show Solution

x_{1} = - \frac{4 27}{3}, x_{2} = \frac{4 27}{3}

Alternative Form

x_{1} \approx - 0.759836, x_{2} \approx 0.759836

Evaluate

x^{3} \times 3 x - 1

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

x^{3} \times 3 x - 1 = 0

Multiply

More Steps

Multiply the terms

x^{3} \times 3 x

Multiply the terms with the same base by adding their exponents

x^{3 + 1} \times 3

Add the numbers

x^{4} \times 3

Use the commutative property to reorder the terms

3 x^{4}

3 x^{4} - 1 = 0

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

3 x^{4} = 0 + 1

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

3 x^{4} = 1

Divide both sides

\frac{3 x ^{4}}{3} = \frac{1}{3}

Divide the numbers

x^{4} = \frac{1}{3}

Take the root of both sides of the equation and remember to use both positive and negative roots

x = \pm 4 \frac{1}{3}

Simplify the expression

More Steps

Evaluate

4 \frac{1}{3}

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

\frac{4 1}{4 3}

Simplify the radical expression

\frac{1}{4 3}

Multiply by the Conjugate

\frac{4 3 ^{3}}{4 3 \times 4 3 ^{3}}

Simplify

\frac{4 27}{4 3 \times 4 3 ^{3}}

Multiply the numbers

More Steps

Evaluate

43 \times 4 3^{3}

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

4 3 \times 3^{3}

Calculate the product

4 3^{4}

Reduce the index of the radical and exponent with 4

3

\frac{4 27}{3}

x = \pm \frac{4 27}{3}

Separate the equation into 2 possible cases

x = \frac{4 27}{3} x = - \frac{4 27}{3}

Solution

x_{1} = - \frac{4 27}{3}, x_{2} = \frac{4 27}{3}

Alternative Form

x_{1} \approx - 0.759836, x_{2} \approx 0.759836

Show Solution