(d^2-13)=0

Solution for (d^2-13)=0 equation:

Simplifying
(d2 + -13) = 0

Reorder the terms:
(-13 + d2) = 0

Remove parenthesis around (-13 + d2)
-13 + d2 = 0

Solving
-13 + d2 = 0

Solving for variable 'd'.

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

Add '13' to each side of the equation.
-13 + 13 + d2 = 0 + 13

Combine like terms: -13 + 13 = 0
0 + d2 = 0 + 13
d2 = 0 + 13

Combine like terms: 0 + 13 = 13
d2 = 13

Simplifying
d2 = 13

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