0=3u^2-72

Solution for 0=3u^2-72 equation:

Simplifying
0 = 3u2 + -72

Reorder the terms:
0 = -72 + 3u2

Solving
0 = -72 + 3u2

Solving for variable 'u'.

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

Add '-3u2' to each side of the equation.
0 + -3u2 = -72 + 3u2 + -3u2
Remove the zero:
-3u2 = -72 + 3u2 + -3u2

Combine like terms: 3u2 + -3u2 = 0
-3u2 = -72 + 0
-3u2 = -72

Divide each side by '-3'.
u2 = 24

Simplifying
u2 = 24

Take the square root of each side:
u = {-4.898979486, 4.898979486}