v^2d^2-81=0

Solution for v^2d^2-81=0 equation:

Simplifying
v2d2 + -81 = 0

Reorder the terms:
-81 + d2v2 = 0

Solving
-81 + d2v2 = 0

Solving for variable 'd'.

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

Add '81' to each side of the equation.
-81 + 81 + d2v2 = 0 + 81

Combine like terms: -81 + 81 = 0
0 + d2v2 = 0 + 81
d2v2 = 0 + 81

Combine like terms: 0 + 81 = 81
d2v2 = 81

Divide each side by 'v2'.
d2 = 81v-2

Simplifying
d2 = 81v-2

Take the square root of each side:
d = {-9v-1, 9v-1}