-1210=-40u^2

Solution for -1210=-40u^2 equation:

Simplifying
-1210 = -40u2

Solving
-1210 = -40u2

Solving for variable 'u'.

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

Add '40u2' to each side of the equation.
-1210 + 40u2 = -40u2 + 40u2

Combine like terms: -40u2 + 40u2 = 0
-1210 + 40u2 = 0

Add '1210' to each side of the equation.
-1210 + 1210 + 40u2 = 0 + 1210

Combine like terms: -1210 + 1210 = 0
0 + 40u2 = 0 + 1210
40u2 = 0 + 1210

Combine like terms: 0 + 1210 = 1210
40u2 = 1210

Divide each side by '40'.
u2 = 30.25

Simplifying
u2 = 30.25

Take the square root of each side:
u = {-5.5, 5.5}