81-x^2-25=0

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

Simplifying
81 + -1x2 + -25 = 0

Reorder the terms:
81 + -25 + -1x2 = 0

Combine like terms: 81 + -25 = 56
56 + -1x2 = 0

Solving
56 + -1x2 = 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 + -1x2 = 0 + -56

Combine like terms: 56 + -56 = 0
0 + -1x2 = 0 + -56
-1x2 = 0 + -56

Combine like terms: 0 + -56 = -56
-1x2 = -56

Divide each side by '-1'.
x2 = 56

Simplifying
x2 = 56

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