x^2-4-9=0

Solution for x^2-4-9=0 equation:

Simplifying
x2 + -4 + -9 = 0

Reorder the terms:
-4 + -9 + x2 = 0

Combine like terms: -4 + -9 = -13
-13 + x2 = 0

Solving
-13 + x2 = 0

Solving for variable 'x'.

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

Add '13' to each side of the equation.
-13 + 13 + x2 = 0 + 13

Combine like terms: -13 + 13 = 0
0 + x2 = 0 + 13
x2 = 0 + 13

Combine like terms: 0 + 13 = 13
x2 = 13

Simplifying
x2 = 13

Take the square root of each side:
x = {-3.605551275, 3.605551275}