(2x^2)+x-27=0

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Solution for (2x^2)+x-27=0 equation:


Simplifying
(2x2) + x + -27 = 0

Reorder the terms:
-27 + x + (2x2) = 0

Solving
-27 + x + (2x2) = 0

Solving for variable 'x'.

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

Divide each side by '2'.
-13.5 + 0.5x + x2 = 0

Move the constant term to the right:

Add '13.5' to each side of the equation.
-13.5 + 0.5x + 13.5 + x2 = 0 + 13.5

Reorder the terms:
-13.5 + 13.5 + 0.5x + x2 = 0 + 13.5

Combine like terms: -13.5 + 13.5 = 0.0
0.0 + 0.5x + x2 = 0 + 13.5
0.5x + x2 = 0 + 13.5

Combine like terms: 0 + 13.5 = 13.5
0.5x + x2 = 13.5

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.
0.5x + 0.25 + x2 = 13.5 + 0.25

Reorder the terms:
0.25 + 0.5x + x2 = 13.5 + 0.25

Combine like terms: 13.5 + 0.25 = 13.75
0.25 + 0.5x + x2 = 13.75

Factor a perfect square on the left side:
((x) + 0.5)((x) + 0.5) = 13.75

Calculate the square root of the right side: 3.708099244

Break this problem into two subproblems by setting 
((x) + 0.5) equal to 3.708099244 and -3.708099244.

Subproblem 1

(x) + 0.5 = 3.708099244 Simplifying (x) + 0.5 = 3.708099244 x + 0.5 = 3.708099244 Reorder the terms: 0.5 + x = 3.708099244 Solving 0.5 + x = 3.708099244 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 = 3.708099244 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 3.708099244 + -0.5 x = 3.708099244 + -0.5 Combine like terms: 3.708099244 + -0.5 = 3.208099244 x = 3.208099244 Simplifying x = 3.208099244

Subproblem 2

(x) + 0.5 = -3.708099244 Simplifying (x) + 0.5 = -3.708099244 x + 0.5 = -3.708099244 Reorder the terms: 0.5 + x = -3.708099244 Solving 0.5 + x = -3.708099244 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 = -3.708099244 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -3.708099244 + -0.5 x = -3.708099244 + -0.5 Combine like terms: -3.708099244 + -0.5 = -4.208099244 x = -4.208099244 Simplifying x = -4.208099244

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.208099244, -4.208099244}

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