u^2-16u+5=0

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Solution for u^2-16u+5=0 equation:


Simplifying
u2 + -16u + 5 = 0

Reorder the terms:
5 + -16u + u2 = 0

Solving
5 + -16u + u2 = 0

Solving for variable 'u'.

Begin completing the square.

Move the constant term to the right:

Add '-5' to each side of the equation.
5 + -16u + -5 + u2 = 0 + -5

Reorder the terms:
5 + -5 + -16u + u2 = 0 + -5

Combine like terms: 5 + -5 = 0
0 + -16u + u2 = 0 + -5
-16u + u2 = 0 + -5

Combine like terms: 0 + -5 = -5
-16u + u2 = -5

The u term is -16u.  Take half its coefficient (-8).
Square it (64) and add it to both sides.

Add '64' to each side of the equation.
-16u + 64 + u2 = -5 + 64

Reorder the terms:
64 + -16u + u2 = -5 + 64

Combine like terms: -5 + 64 = 59
64 + -16u + u2 = 59

Factor a perfect square on the left side:
(u + -8)(u + -8) = 59

Calculate the square root of the right side: 7.681145748

Break this problem into two subproblems by setting 
(u + -8) equal to 7.681145748 and -7.681145748.

Subproblem 1

u + -8 = 7.681145748 Simplifying u + -8 = 7.681145748 Reorder the terms: -8 + u = 7.681145748 Solving -8 + u = 7.681145748 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + u = 7.681145748 + 8 Combine like terms: -8 + 8 = 0 0 + u = 7.681145748 + 8 u = 7.681145748 + 8 Combine like terms: 7.681145748 + 8 = 15.681145748 u = 15.681145748 Simplifying u = 15.681145748

Subproblem 2

u + -8 = -7.681145748 Simplifying u + -8 = -7.681145748 Reorder the terms: -8 + u = -7.681145748 Solving -8 + u = -7.681145748 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + u = -7.681145748 + 8 Combine like terms: -8 + 8 = 0 0 + u = -7.681145748 + 8 u = -7.681145748 + 8 Combine like terms: -7.681145748 + 8 = 0.318854252 u = 0.318854252 Simplifying u = 0.318854252

Solution

The solution to the problem is based on the solutions from the subproblems. u = {15.681145748, 0.318854252}

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