4-9u^2=0

Solution for 4-9u^2=0 equation:

Simplifying
4 + -9u2 = 0

Solving
4 + -9u2 = 0

Solving for variable 'u'.

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

Add '-4' to each side of the equation.
4 + -4 + -9u2 = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -9u2 = 0 + -4
-9u2 = 0 + -4

Combine like terms: 0 + -4 = -4
-9u2 = -4

Divide each side by '-9'.
u2 = 0.4444444444

Simplifying
u2 = 0.4444444444

Take the square root of each side:
u = {-0.666666667, 0.666666667}