4x^2-4x-5.5=0

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Solution for 4x^2-4x-5.5=0 equation:


Simplifying
4x2 + -4x + -5.5 = 0

Reorder the terms:
-5.5 + -4x + 4x2 = 0

Solving
-5.5 + -4x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
-1.375 + -1x + x2 = 0

Move the constant term to the right:

Add '1.375' to each side of the equation.
-1.375 + -1x + 1.375 + x2 = 0 + 1.375

Reorder the terms:
-1.375 + 1.375 + -1x + x2 = 0 + 1.375

Combine like terms: -1.375 + 1.375 = 0.000
0.000 + -1x + x2 = 0 + 1.375
-1x + x2 = 0 + 1.375

Combine like terms: 0 + 1.375 = 1.375
-1x + x2 = 1.375

The x term is -1x.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1x + 0.25 + x2 = 1.375 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 1.375 + 0.25

Combine like terms: 1.375 + 0.25 = 1.625
0.25 + -1x + x2 = 1.625

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 1.625

Calculate the square root of the right side: 1.274754878

Break this problem into two subproblems by setting 
(x + -0.5) equal to 1.274754878 and -1.274754878.

Subproblem 1

x + -0.5 = 1.274754878 Simplifying x + -0.5 = 1.274754878 Reorder the terms: -0.5 + x = 1.274754878 Solving -0.5 + x = 1.274754878 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = 1.274754878 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 1.274754878 + 0.5 x = 1.274754878 + 0.5 Combine like terms: 1.274754878 + 0.5 = 1.774754878 x = 1.774754878 Simplifying x = 1.774754878

Subproblem 2

x + -0.5 = -1.274754878 Simplifying x + -0.5 = -1.274754878 Reorder the terms: -0.5 + x = -1.274754878 Solving -0.5 + x = -1.274754878 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = -1.274754878 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -1.274754878 + 0.5 x = -1.274754878 + 0.5 Combine like terms: -1.274754878 + 0.5 = -0.774754878 x = -0.774754878 Simplifying x = -0.774754878

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.774754878, -0.774754878}

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