u^2-14u+8=0

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Solution for u^2-14u+8=0 equation:


Simplifying
u2 + -14u + 8 = 0

Reorder the terms:
8 + -14u + u2 = 0

Solving
8 + -14u + u2 = 0

Solving for variable 'u'.

Begin completing the square.

Move the constant term to the right:

Add '-8' to each side of the equation.
8 + -14u + -8 + u2 = 0 + -8

Reorder the terms:
8 + -8 + -14u + u2 = 0 + -8

Combine like terms: 8 + -8 = 0
0 + -14u + u2 = 0 + -8
-14u + u2 = 0 + -8

Combine like terms: 0 + -8 = -8
-14u + u2 = -8

The u term is -14u.  Take half its coefficient (-7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
-14u + 49 + u2 = -8 + 49

Reorder the terms:
49 + -14u + u2 = -8 + 49

Combine like terms: -8 + 49 = 41
49 + -14u + u2 = 41

Factor a perfect square on the left side:
(u + -7)(u + -7) = 41

Calculate the square root of the right side: 6.403124237

Break this problem into two subproblems by setting 
(u + -7) equal to 6.403124237 and -6.403124237.

Subproblem 1

u + -7 = 6.403124237 Simplifying u + -7 = 6.403124237 Reorder the terms: -7 + u = 6.403124237 Solving -7 + u = 6.403124237 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + u = 6.403124237 + 7 Combine like terms: -7 + 7 = 0 0 + u = 6.403124237 + 7 u = 6.403124237 + 7 Combine like terms: 6.403124237 + 7 = 13.403124237 u = 13.403124237 Simplifying u = 13.403124237

Subproblem 2

u + -7 = -6.403124237 Simplifying u + -7 = -6.403124237 Reorder the terms: -7 + u = -6.403124237 Solving -7 + u = -6.403124237 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + u = -6.403124237 + 7 Combine like terms: -7 + 7 = 0 0 + u = -6.403124237 + 7 u = -6.403124237 + 7 Combine like terms: -6.403124237 + 7 = 0.596875763 u = 0.596875763 Simplifying u = 0.596875763

Solution

The solution to the problem is based on the solutions from the subproblems. u = {13.403124237, 0.596875763}

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