(u+2)2-90=0

Solution for (u+2)2-90=0 equation:

Simplifying
(u + 2) * 2 + -90 = 0

Reorder the terms:
(2 + u) * 2 + -90 = 0

Reorder the terms for easier multiplication:
2(2 + u) + -90 = 0
(2 * 2 + u * 2) + -90 = 0
(4 + 2u) + -90 = 0

Reorder the terms:
4 + -90 + 2u = 0

Combine like terms: 4 + -90 = -86
-86 + 2u = 0

Solving
-86 + 2u = 0

Solving for variable 'u'.

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

Add '86' to each side of the equation.
-86 + 86 + 2u = 0 + 86

Combine like terms: -86 + 86 = 0
0 + 2u = 0 + 86
2u = 0 + 86

Combine like terms: 0 + 86 = 86
2u = 86

Divide each side by '2'.
u = 43

Simplifying
u = 43