2x^2-23x-162=0

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Solution for 2x^2-23x-162=0 equation:


Simplifying
2x2 + -23x + -162 = 0

Reorder the terms:
-162 + -23x + 2x2 = 0

Solving
-162 + -23x + 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'.
-81 + -11.5x + x2 = 0

Move the constant term to the right:

Add '81' to each side of the equation.
-81 + -11.5x + 81 + x2 = 0 + 81

Reorder the terms:
-81 + 81 + -11.5x + x2 = 0 + 81

Combine like terms: -81 + 81 = 0
0 + -11.5x + x2 = 0 + 81
-11.5x + x2 = 0 + 81

Combine like terms: 0 + 81 = 81
-11.5x + x2 = 81

The x term is -11.5x.  Take half its coefficient (-5.75).
Square it (33.0625) and add it to both sides.

Add '33.0625' to each side of the equation.
-11.5x + 33.0625 + x2 = 81 + 33.0625

Reorder the terms:
33.0625 + -11.5x + x2 = 81 + 33.0625

Combine like terms: 81 + 33.0625 = 114.0625
33.0625 + -11.5x + x2 = 114.0625

Factor a perfect square on the left side:
(x + -5.75)(x + -5.75) = 114.0625

Calculate the square root of the right side: 10.680004682

Break this problem into two subproblems by setting 
(x + -5.75) equal to 10.680004682 and -10.680004682.

Subproblem 1

x + -5.75 = 10.680004682 Simplifying x + -5.75 = 10.680004682 Reorder the terms: -5.75 + x = 10.680004682 Solving -5.75 + x = 10.680004682 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.75' to each side of the equation. -5.75 + 5.75 + x = 10.680004682 + 5.75 Combine like terms: -5.75 + 5.75 = 0.00 0.00 + x = 10.680004682 + 5.75 x = 10.680004682 + 5.75 Combine like terms: 10.680004682 + 5.75 = 16.430004682 x = 16.430004682 Simplifying x = 16.430004682

Subproblem 2

x + -5.75 = -10.680004682 Simplifying x + -5.75 = -10.680004682 Reorder the terms: -5.75 + x = -10.680004682 Solving -5.75 + x = -10.680004682 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.75' to each side of the equation. -5.75 + 5.75 + x = -10.680004682 + 5.75 Combine like terms: -5.75 + 5.75 = 0.00 0.00 + x = -10.680004682 + 5.75 x = -10.680004682 + 5.75 Combine like terms: -10.680004682 + 5.75 = -4.930004682 x = -4.930004682 Simplifying x = -4.930004682

Solution

The solution to the problem is based on the solutions from the subproblems. x = {16.430004682, -4.930004682}

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