2x^2-77=0

Solution for 2x^2-77=0 equation:

Simplifying
2x2 + -77 = 0

Reorder the terms:
-77 + 2x2 = 0

Solving
-77 + 2x2 = 0

Solving for variable 'x'.

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

Add '77' to each side of the equation.
-77 + 77 + 2x2 = 0 + 77

Combine like terms: -77 + 77 = 0
0 + 2x2 = 0 + 77
2x2 = 0 + 77

Combine like terms: 0 + 77 = 77
2x2 = 77

Divide each side by '2'.
x2 = 38.5

Simplifying
x2 = 38.5

Take the square root of each side:
x = {-6.204836823, 6.204836823}