-4u^2+11u-5=0

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Solution for -4u^2+11u-5=0 equation:


Simplifying
-4u2 + 11u + -5 = 0

Reorder the terms:
-5 + 11u + -4u2 = 0

Solving
-5 + 11u + -4u2 = 0

Solving for variable 'u'.

Begin completing the square.  Divide all terms by
-4 the coefficient of the squared term: 

Divide each side by '-4'.
1.25 + -2.75u + u2 = 0

Move the constant term to the right:

Add '-1.25' to each side of the equation.
1.25 + -2.75u + -1.25 + u2 = 0 + -1.25

Reorder the terms:
1.25 + -1.25 + -2.75u + u2 = 0 + -1.25

Combine like terms: 1.25 + -1.25 = 0.00
0.00 + -2.75u + u2 = 0 + -1.25
-2.75u + u2 = 0 + -1.25

Combine like terms: 0 + -1.25 = -1.25
-2.75u + u2 = -1.25

The u term is -2.75u.  Take half its coefficient (-1.375).
Square it (1.890625) and add it to both sides.

Add '1.890625' to each side of the equation.
-2.75u + 1.890625 + u2 = -1.25 + 1.890625

Reorder the terms:
1.890625 + -2.75u + u2 = -1.25 + 1.890625

Combine like terms: -1.25 + 1.890625 = 0.640625
1.890625 + -2.75u + u2 = 0.640625

Factor a perfect square on the left side:
(u + -1.375)(u + -1.375) = 0.640625

Calculate the square root of the right side: 0.80039053

Break this problem into two subproblems by setting 
(u + -1.375) equal to 0.80039053 and -0.80039053.

Subproblem 1

u + -1.375 = 0.80039053 Simplifying u + -1.375 = 0.80039053 Reorder the terms: -1.375 + u = 0.80039053 Solving -1.375 + u = 0.80039053 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '1.375' to each side of the equation. -1.375 + 1.375 + u = 0.80039053 + 1.375 Combine like terms: -1.375 + 1.375 = 0.000 0.000 + u = 0.80039053 + 1.375 u = 0.80039053 + 1.375 Combine like terms: 0.80039053 + 1.375 = 2.17539053 u = 2.17539053 Simplifying u = 2.17539053

Subproblem 2

u + -1.375 = -0.80039053 Simplifying u + -1.375 = -0.80039053 Reorder the terms: -1.375 + u = -0.80039053 Solving -1.375 + u = -0.80039053 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '1.375' to each side of the equation. -1.375 + 1.375 + u = -0.80039053 + 1.375 Combine like terms: -1.375 + 1.375 = 0.000 0.000 + u = -0.80039053 + 1.375 u = -0.80039053 + 1.375 Combine like terms: -0.80039053 + 1.375 = 0.57460947 u = 0.57460947 Simplifying u = 0.57460947

Solution

The solution to the problem is based on the solutions from the subproblems. u = {2.17539053, 0.57460947}

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