64=9u^2

Solution for 64=9u^2 equation:

Simplifying
64 = 9u2

Solving
64 = 9u2

Solving for variable 'u'.

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

Add '-9u2' to each side of the equation.
64 + -9u2 = 9u2 + -9u2

Combine like terms: 9u2 + -9u2 = 0
64 + -9u2 = 0

Add '-64' to each side of the equation.
64 + -64 + -9u2 = 0 + -64

Combine like terms: 64 + -64 = 0
0 + -9u2 = 0 + -64
-9u2 = 0 + -64

Combine like terms: 0 + -64 = -64
-9u2 = -64

Divide each side by '-9'.
u2 = 7.111111111

Simplifying
u2 = 7.111111111

Take the square root of each side:
u = {-2.666666667, 2.666666667}