(9x^2)+x-55=0

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Solution for (9x^2)+x-55=0 equation:


Simplifying
(9x2) + x + -55 = 0

Reorder the terms:
-55 + x + (9x2) = 0

Solving
-55 + x + (9x2) = 0

Solving for variable 'x'.

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

Divide each side by '9'.
-6.111111111 + 0.1111111111x + x2 = 0

Move the constant term to the right:

Add '6.111111111' to each side of the equation.
-6.111111111 + 0.1111111111x + 6.111111111 + x2 = 0 + 6.111111111

Reorder the terms:
-6.111111111 + 6.111111111 + 0.1111111111x + x2 = 0 + 6.111111111

Combine like terms: -6.111111111 + 6.111111111 = 0.000000000
0.000000000 + 0.1111111111x + x2 = 0 + 6.111111111
0.1111111111x + x2 = 0 + 6.111111111

Combine like terms: 0 + 6.111111111 = 6.111111111
0.1111111111x + x2 = 6.111111111

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.
0.1111111111x + 0.25 + x2 = 6.111111111 + 0.25

Reorder the terms:
0.25 + 0.1111111111x + x2 = 6.111111111 + 0.25

Combine like terms: 6.111111111 + 0.25 = 6.361111111
0.25 + 0.1111111111x + x2 = 6.361111111

Factor a perfect square on the left side:
((x) + 0.5)((x) + 0.5) = 6.361111111

Calculate the square root of the right side: 2.522124325

Break this problem into two subproblems by setting 
((x) + 0.5) equal to 2.522124325 and -2.522124325.

Subproblem 1

(x) + 0.5 = 2.522124325 Simplifying (x) + 0.5 = 2.522124325 x + 0.5 = 2.522124325 Reorder the terms: 0.5 + x = 2.522124325 Solving 0.5 + x = 2.522124325 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 = 2.522124325 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 2.522124325 + -0.5 x = 2.522124325 + -0.5 Combine like terms: 2.522124325 + -0.5 = 2.022124325 x = 2.022124325 Simplifying x = 2.022124325

Subproblem 2

(x) + 0.5 = -2.522124325 Simplifying (x) + 0.5 = -2.522124325 x + 0.5 = -2.522124325 Reorder the terms: 0.5 + x = -2.522124325 Solving 0.5 + x = -2.522124325 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 = -2.522124325 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -2.522124325 + -0.5 x = -2.522124325 + -0.5 Combine like terms: -2.522124325 + -0.5 = -3.022124325 x = -3.022124325 Simplifying x = -3.022124325

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.022124325, -3.022124325}

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