55.5x^2+x-55=0

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Solution for 55.5x^2+x-55=0 equation:


Simplifying
55.5x2 + x + -55 = 0

Reorder the terms:
-55 + x + 55.5x2 = 0

Solving
-55 + x + 55.5x2 = 0

Solving for variable 'x'.

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

Divide each side by '55.5'.
-0.990990991 + 0.01801801802x + x2 = 0

Move the constant term to the right:

Add '0.990990991' to each side of the equation.
-0.990990991 + 0.01801801802x + 0.990990991 + x2 = 0 + 0.990990991

Reorder the terms:
-0.990990991 + 0.990990991 + 0.01801801802x + x2 = 0 + 0.990990991

Combine like terms: -0.990990991 + 0.990990991 = 0.000000000
0.000000000 + 0.01801801802x + x2 = 0 + 0.990990991
0.01801801802x + x2 = 0 + 0.990990991

Combine like terms: 0 + 0.990990991 = 0.990990991
0.01801801802x + x2 = 0.990990991

The x term is x.  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.
0.01801801802x + 0.25 + x2 = 0.990990991 + 0.25

Reorder the terms:
0.25 + 0.01801801802x + x2 = 0.990990991 + 0.25

Combine like terms: 0.990990991 + 0.25 = 1.240990991
0.25 + 0.01801801802x + x2 = 1.240990991

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 1.240990991

Calculate the square root of the right side: 1.113997752

Break this problem into two subproblems by setting 
(x + 0.5) equal to 1.113997752 and -1.113997752.

Subproblem 1

x + 0.5 = 1.113997752 Simplifying x + 0.5 = 1.113997752 Reorder the terms: 0.5 + x = 1.113997752 Solving 0.5 + x = 1.113997752 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 = 1.113997752 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 1.113997752 + -0.5 x = 1.113997752 + -0.5 Combine like terms: 1.113997752 + -0.5 = 0.613997752 x = 0.613997752 Simplifying x = 0.613997752

Subproblem 2

x + 0.5 = -1.113997752 Simplifying x + 0.5 = -1.113997752 Reorder the terms: 0.5 + x = -1.113997752 Solving 0.5 + x = -1.113997752 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 = -1.113997752 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -1.113997752 + -0.5 x = -1.113997752 + -0.5 Combine like terms: -1.113997752 + -0.5 = -1.613997752 x = -1.613997752 Simplifying x = -1.613997752

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.613997752, -1.613997752}

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