4=2a^2

Solution for 4=2a^2 equation:

Simplifying
4 = 2a2

Solving
4 = 2a2

Solving for variable 'a'.

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

Add '-2a2' to each side of the equation.
4 + -2a2 = 2a2 + -2a2

Combine like terms: 2a2 + -2a2 = 0
4 + -2a2 = 0

Add '-4' to each side of the equation.
4 + -4 + -2a2 = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -2a2 = 0 + -4
-2a2 = 0 + -4

Combine like terms: 0 + -4 = -4
-2a2 = -4

Divide each side by '-2'.
a2 = 2

Simplifying
a2 = 2

Take the square root of each side:
a = {-1.414213562, 1.414213562}