.5x^2+6+x=31

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Solution for .5x^2+6+x=31 equation:


Simplifying
0.5x2 + 6 + x = 31

Reorder the terms:
6 + x + 0.5x2 = 31

Solving
6 + x + 0.5x2 = 31

Solving for variable 'x'.

Reorder the terms:
6 + -31 + x + 0.5x2 = 31 + -31

Combine like terms: 6 + -31 = -25
-25 + x + 0.5x2 = 31 + -31

Combine like terms: 31 + -31 = 0
-25 + x + 0.5x2 = 0

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

Divide each side by '0.5'.
-50 + 2x + x2 = 0

Move the constant term to the right:

Add '50' to each side of the equation.
-50 + 2x + 50 + x2 = 0 + 50

Reorder the terms:
-50 + 50 + 2x + x2 = 0 + 50

Combine like terms: -50 + 50 = 0
0 + 2x + x2 = 0 + 50
2x + x2 = 0 + 50

Combine like terms: 0 + 50 = 50
2x + x2 = 50

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.
2x + 0.25 + x2 = 50 + 0.25

Reorder the terms:
0.25 + 2x + x2 = 50 + 0.25

Combine like terms: 50 + 0.25 = 50.25
0.25 + 2x + x2 = 50.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 50.25

Calculate the square root of the right side: 7.088723439

Break this problem into two subproblems by setting 
(x + 0.5) equal to 7.088723439 and -7.088723439.

Subproblem 1

x + 0.5 = 7.088723439 Simplifying x + 0.5 = 7.088723439 Reorder the terms: 0.5 + x = 7.088723439 Solving 0.5 + x = 7.088723439 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 = 7.088723439 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 7.088723439 + -0.5 x = 7.088723439 + -0.5 Combine like terms: 7.088723439 + -0.5 = 6.588723439 x = 6.588723439 Simplifying x = 6.588723439

Subproblem 2

x + 0.5 = -7.088723439 Simplifying x + 0.5 = -7.088723439 Reorder the terms: 0.5 + x = -7.088723439 Solving 0.5 + x = -7.088723439 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 = -7.088723439 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -7.088723439 + -0.5 x = -7.088723439 + -0.5 Combine like terms: -7.088723439 + -0.5 = -7.588723439 x = -7.588723439 Simplifying x = -7.588723439

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.588723439, -7.588723439}

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