a^2-0.69=0

Solution for a^2-0.69=0 equation:

Simplifying
a2 + -0.69 = 0

Reorder the terms:
-0.69 + a2 = 0

Solving
-0.69 + a2 = 0

Solving for variable 'a'.

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

Add '0.69' to each side of the equation.
-0.69 + 0.69 + a2 = 0 + 0.69

Combine like terms: -0.69 + 0.69 = 0.00
0.00 + a2 = 0 + 0.69
a2 = 0 + 0.69

Combine like terms: 0 + 0.69 = 0.69
a2 = 0.69

Simplifying
a2 = 0.69

Take the square root of each side:
a = {-0.830662386, 0.830662386}