Solve x^2 2x-4 - ScanMath

Question

Simplify the expression

2 x^{3} - 4

Evaluate

x^{2} \times 2 x - 4

Solution

More Steps

Evaluate

x^{2} \times 2 x

Multiply the terms with the same base by adding their exponents

x^{2 + 1} \times 2

Add the numbers

x^{3} \times 2

Use the commutative property to reorder the terms

2 x^{3}

2 x^{3} - 4

Show Solution

2 (x^{3} - 2)

Evaluate

x^{2} \times 2 x - 4

Multiply

More Steps

Evaluate

x^{2} \times 2 x

Multiply the terms with the same base by adding their exponents

x^{2 + 1} \times 2

Add the numbers

x^{3} \times 2

Use the commutative property to reorder the terms

2 x^{3}

2 x^{3} - 4

Solution

2 (x^{3} - 2)

Show Solution

x = 32

Alternative Form

x \approx 1.259921

Evaluate

x^{2} \times 2 x - 4

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

x^{2} \times 2 x - 4 = 0

Multiply

More Steps

Multiply the terms

x^{2} \times 2 x

Multiply the terms with the same base by adding their exponents

x^{2 + 1} \times 2

Add the numbers

x^{3} \times 2

Use the commutative property to reorder the terms

2 x^{3}

2 x^{3} - 4 = 0

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

2 x^{3} = 0 + 4

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

2 x^{3} = 4

Divide both sides

\frac{2 x ^{3}}{2} = \frac{4}{2}

Divide the numbers

x^{3} = \frac{4}{2}

Divide the numbers

More Steps

Evaluate

\frac{4}{2}

Reduce the numbers

\frac{2}{1}

Calculate

2

x^{3} = 2

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

3 x^{3} = 32

Solution

x = 32

Alternative Form

x \approx 1.259921

Show Solution