2x^2-4=5

Solution for 2x^2-4=5 equation:

Simplifying
2x2 + -4 = 5

Reorder the terms:
-4 + 2x2 = 5

Solving
-4 + 2x2 = 5

Solving for variable 'x'.

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

Add '4' to each side of the equation.
-4 + 4 + 2x2 = 5 + 4

Combine like terms: -4 + 4 = 0
0 + 2x2 = 5 + 4
2x2 = 5 + 4

Combine like terms: 5 + 4 = 9
2x2 = 9

Divide each side by '2'.
x2 = 4.5

Simplifying
x2 = 4.5

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