x^2-31x-234=0

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Solution for x^2-31x-234=0 equation:


Simplifying
x2 + -31x + -234 = 0

Reorder the terms:
-234 + -31x + x2 = 0

Solving
-234 + -31x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '234' to each side of the equation.
-234 + -31x + 234 + x2 = 0 + 234

Reorder the terms:
-234 + 234 + -31x + x2 = 0 + 234

Combine like terms: -234 + 234 = 0
0 + -31x + x2 = 0 + 234
-31x + x2 = 0 + 234

Combine like terms: 0 + 234 = 234
-31x + x2 = 234

The x term is -31x.  Take half its coefficient (-15.5).
Square it (240.25) and add it to both sides.

Add '240.25' to each side of the equation.
-31x + 240.25 + x2 = 234 + 240.25

Reorder the terms:
240.25 + -31x + x2 = 234 + 240.25

Combine like terms: 234 + 240.25 = 474.25
240.25 + -31x + x2 = 474.25

Factor a perfect square on the left side:
(x + -15.5)(x + -15.5) = 474.25

Calculate the square root of the right side: 21.77728174

Break this problem into two subproblems by setting 
(x + -15.5) equal to 21.77728174 and -21.77728174.

Subproblem 1

x + -15.5 = 21.77728174 Simplifying x + -15.5 = 21.77728174 Reorder the terms: -15.5 + x = 21.77728174 Solving -15.5 + x = 21.77728174 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '15.5' to each side of the equation. -15.5 + 15.5 + x = 21.77728174 + 15.5 Combine like terms: -15.5 + 15.5 = 0.0 0.0 + x = 21.77728174 + 15.5 x = 21.77728174 + 15.5 Combine like terms: 21.77728174 + 15.5 = 37.27728174 x = 37.27728174 Simplifying x = 37.27728174

Subproblem 2

x + -15.5 = -21.77728174 Simplifying x + -15.5 = -21.77728174 Reorder the terms: -15.5 + x = -21.77728174 Solving -15.5 + x = -21.77728174 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '15.5' to each side of the equation. -15.5 + 15.5 + x = -21.77728174 + 15.5 Combine like terms: -15.5 + 15.5 = 0.0 0.0 + x = -21.77728174 + 15.5 x = -21.77728174 + 15.5 Combine like terms: -21.77728174 + 15.5 = -6.27728174 x = -6.27728174 Simplifying x = -6.27728174

Solution

The solution to the problem is based on the solutions from the subproblems. x = {37.27728174, -6.27728174}

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