Solve 2x^4-8 - ScanMath

Evaluate

2 x^{4} - 8

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

2 x^{4} - 8 = 0

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

2 x^{4} = 0 + 8

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

2 x^{4} = 8

Divide both sides

\frac{2 x ^{4}}{2} = \frac{8}{2}

Divide the numbers

x^{4} = \frac{8}{2}

Divide the numbers

More Steps

x^{4} = 4

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

x = \pm 44

Simplify the expression

More Steps

x = \pm 2

Separate the equation into 2 possible cases

x = 2 x = - 2

Solution

x_{1} = - 2, x_{2} = 2

Alternative Form

x_{1} \approx - 1.414214, x_{2} \approx 1.414214

Factor the expression