=2(2x^2-9)

Solution for =2(2x^2-9) equation:

Simplifying
0 = 2(2x2 + -9)

Reorder the terms:
0 = 2(-9 + 2x2)
0 = (-9 * 2 + 2x2 * 2)
0 = (-18 + 4x2)

Solving
0 = -18 + 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.
0 + -4x2 = -18 + 4x2 + -4x2
Remove the zero:
-4x2 = -18 + 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
-4x2 = -18 + 0
-4x2 = -18

Divide each side by '-4'.
x2 = 4.5

Simplifying
x2 = 4.5

Take the square root of each side:
x = {-2.121320344, 2.121320344}