x^2+25-81=0

Solution for x^2+25-81=0 equation:

Simplifying
x2 + 25 + -81 = 0

Reorder the terms:
25 + -81 + x2 = 0

Combine like terms: 25 + -81 = -56
-56 + x2 = 0

Solving
-56 + x2 = 0

Solving for variable 'x'.

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

Add '56' to each side of the equation.
-56 + 56 + x2 = 0 + 56

Combine like terms: -56 + 56 = 0
0 + x2 = 0 + 56
x2 = 0 + 56

Combine like terms: 0 + 56 = 56
x2 = 56

Simplifying
x2 = 56

Take the square root of each side:
x = {-7.483314774, 7.483314774}