0.5x^2-x-19=0.5x+26

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Solution for 0.5x^2-x-19=0.5x+26 equation:


Simplifying
0.5x2 + -1x + -19 = 0.5x + 26

Reorder the terms:
-19 + -1x + 0.5x2 = 0.5x + 26

Reorder the terms:
-19 + -1x + 0.5x2 = 26 + 0.5x

Solving
-19 + -1x + 0.5x2 = 26 + 0.5x

Solving for variable 'x'.

Reorder the terms:
-19 + -26 + -1x + -0.5x + 0.5x2 = 26 + 0.5x + -26 + -0.5x

Combine like terms: -19 + -26 = -45
-45 + -1x + -0.5x + 0.5x2 = 26 + 0.5x + -26 + -0.5x

Combine like terms: -1x + -0.5x = -1.5x
-45 + -1.5x + 0.5x2 = 26 + 0.5x + -26 + -0.5x

Reorder the terms:
-45 + -1.5x + 0.5x2 = 26 + -26 + 0.5x + -0.5x

Combine like terms: 26 + -26 = 0
-45 + -1.5x + 0.5x2 = 0 + 0.5x + -0.5x
-45 + -1.5x + 0.5x2 = 0.5x + -0.5x

Combine like terms: 0.5x + -0.5x = 0.0
-45 + -1.5x + 0.5x2 = 0.0

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

Divide each side by '0.5'.
-90 + -3x + x2 = 0

Move the constant term to the right:

Add '90' to each side of the equation.
-90 + -3x + 90 + x2 = 0 + 90

Reorder the terms:
-90 + 90 + -3x + x2 = 0 + 90

Combine like terms: -90 + 90 = 0
0 + -3x + x2 = 0 + 90
-3x + x2 = 0 + 90

Combine like terms: 0 + 90 = 90
-3x + x2 = 90

The x term is -3x.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3x + 2.25 + x2 = 90 + 2.25

Reorder the terms:
2.25 + -3x + x2 = 90 + 2.25

Combine like terms: 90 + 2.25 = 92.25
2.25 + -3x + x2 = 92.25

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 92.25

Calculate the square root of the right side: 9.604686356

Break this problem into two subproblems by setting 
(x + -1.5) equal to 9.604686356 and -9.604686356.

Subproblem 1

x + -1.5 = 9.604686356 Simplifying x + -1.5 = 9.604686356 Reorder the terms: -1.5 + x = 9.604686356 Solving -1.5 + x = 9.604686356 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = 9.604686356 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 9.604686356 + 1.5 x = 9.604686356 + 1.5 Combine like terms: 9.604686356 + 1.5 = 11.104686356 x = 11.104686356 Simplifying x = 11.104686356

Subproblem 2

x + -1.5 = -9.604686356 Simplifying x + -1.5 = -9.604686356 Reorder the terms: -1.5 + x = -9.604686356 Solving -1.5 + x = -9.604686356 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = -9.604686356 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -9.604686356 + 1.5 x = -9.604686356 + 1.5 Combine like terms: -9.604686356 + 1.5 = -8.104686356 x = -8.104686356 Simplifying x = -8.104686356

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.104686356, -8.104686356}

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