2x^2-78=0

Solution for 2x^2-78=0 equation:

Simplifying
2x2 + -78 = 0

Reorder the terms:
-78 + 2x2 = 0

Solving
-78 + 2x2 = 0

Solving for variable 'x'.

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

Add '78' to each side of the equation.
-78 + 78 + 2x2 = 0 + 78

Combine like terms: -78 + 78 = 0
0 + 2x2 = 0 + 78
2x2 = 0 + 78

Combine like terms: 0 + 78 = 78
2x2 = 78

Divide each side by '2'.
x2 = 39

Simplifying
x2 = 39

Take the square root of each side:
x = {-6.244997998, 6.244997998}