9.86=(2*x^2)2

Solution for 9.86=(2*x^2)2 equation:

Simplifying
9.86 = (2x2) * 2

Remove parenthesis around (2x2)
9.86 = 2x2 * 2

Reorder the terms for easier multiplication:
9.86 = 2 * 2x2

Multiply 2 * 2
9.86 = 4x2

Solving
9.86 = 4x2

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-4x2' to each side of the equation.
9.86 + -4x2 = 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
9.86 + -4x2 = 0

Add '-9.86' to each side of the equation.
9.86 + -9.86 + -4x2 = 0 + -9.86

Combine like terms: 9.86 + -9.86 = 0.00
0.00 + -4x2 = 0 + -9.86
-4x2 = 0 + -9.86

Combine like terms: 0 + -9.86 = -9.86
-4x2 = -9.86

Divide each side by '-4'.
x2 = 2.465

Simplifying
x2 = 2.465

Take the square root of each side:
x = {-1.570031847, 1.570031847}