0.64=a^2

Solution for 0.64=a^2 equation:

Simplifying
0.64 = a2

Solving
0.64 = a2

Solving for variable 'a'.

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

Add '-1a2' to each side of the equation.
0.64 + -1a2 = a2 + -1a2

Combine like terms: a2 + -1a2 = 0
0.64 + -1a2 = 0

Add '-0.64' to each side of the equation.
0.64 + -0.64 + -1a2 = 0 + -0.64

Combine like terms: 0.64 + -0.64 = 0.00
0.00 + -1a2 = 0 + -0.64
-1a2 = 0 + -0.64

Combine like terms: 0 + -0.64 = -0.64
-1a2 = -0.64

Divide each side by '-1'.
a2 = 0.64

Simplifying
a2 = 0.64

Take the square root of each side:
a = {-0.8, 0.8}