81v^2-64u^2=

Solution for 81v^2-64u^2= equation:

Simplifying
81v2 + -64u2 = 0

Reorder the terms:
-64u2 + 81v2 = 0

Solving
-64u2 + 81v2 = 0

Solving for variable 'u'.

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

Add '-81v2' to each side of the equation.
-64u2 + 81v2 + -81v2 = 0 + -81v2

Combine like terms: 81v2 + -81v2 = 0
-64u2 + 0 = 0 + -81v2
-64u2 = 0 + -81v2
Remove the zero:
-64u2 = -81v2

Divide each side by '-64'.
u2 = 1.265625v2

Simplifying
u2 = 1.265625v2

Take the square root of each side:
u = {-1.125v, 1.125v}