4+9=c^2

Solution for 4+9=c^2 equation:

Simplifying
4 + 9 = c2

Combine like terms: 4 + 9 = 13
13 = c2

Solving
13 = c2

Solving for variable 'c'.

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

Add '-1c2' to each side of the equation.
13 + -1c2 = c2 + -1c2

Combine like terms: c2 + -1c2 = 0
13 + -1c2 = 0

Add '-13' to each side of the equation.
13 + -13 + -1c2 = 0 + -13

Combine like terms: 13 + -13 = 0
0 + -1c2 = 0 + -13
-1c2 = 0 + -13

Combine like terms: 0 + -13 = -13
-1c2 = -13

Divide each side by '-1'.
c2 = 13

Simplifying
c2 = 13

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