49u^2-4=0

Solution for 49u^2-4=0 equation:

Simplifying
49u2 + -4 = 0

Reorder the terms:
-4 + 49u2 = 0

Solving
-4 + 49u2 = 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 + 49u2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + 49u2 = 0 + 4
49u2 = 0 + 4

Combine like terms: 0 + 4 = 4
49u2 = 4

Divide each side by '49'.
u2 = 0.08163265306

Simplifying
u2 = 0.08163265306

Take the square root of each side:
u = {-0.285714286, 0.285714286}