.5x^2-13x+15=0

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Solution for .5x^2-13x+15=0 equation:


Simplifying
0.5x2 + -13x + 15 = 0

Reorder the terms:
15 + -13x + 0.5x2 = 0

Solving
15 + -13x + 0.5x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.5'.
30 + -26x + x2 = 0

Move the constant term to the right:

Add '-30' to each side of the equation.
30 + -26x + -30 + x2 = 0 + -30

Reorder the terms:
30 + -30 + -26x + x2 = 0 + -30

Combine like terms: 30 + -30 = 0
0 + -26x + x2 = 0 + -30
-26x + x2 = 0 + -30

Combine like terms: 0 + -30 = -30
-26x + x2 = -30

The x term is -26x.  Take half its coefficient (-13).
Square it (169) and add it to both sides.

Add '169' to each side of the equation.
-26x + 169 + x2 = -30 + 169

Reorder the terms:
169 + -26x + x2 = -30 + 169

Combine like terms: -30 + 169 = 139
169 + -26x + x2 = 139

Factor a perfect square on the left side:
(x + -13)(x + -13) = 139

Calculate the square root of the right side: 11.789826123

Break this problem into two subproblems by setting 
(x + -13) equal to 11.789826123 and -11.789826123.

Subproblem 1

x + -13 = 11.789826123 Simplifying x + -13 = 11.789826123 Reorder the terms: -13 + x = 11.789826123 Solving -13 + x = 11.789826123 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '13' to each side of the equation. -13 + 13 + x = 11.789826123 + 13 Combine like terms: -13 + 13 = 0 0 + x = 11.789826123 + 13 x = 11.789826123 + 13 Combine like terms: 11.789826123 + 13 = 24.789826123 x = 24.789826123 Simplifying x = 24.789826123

Subproblem 2

x + -13 = -11.789826123 Simplifying x + -13 = -11.789826123 Reorder the terms: -13 + x = -11.789826123 Solving -13 + x = -11.789826123 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '13' to each side of the equation. -13 + 13 + x = -11.789826123 + 13 Combine like terms: -13 + 13 = 0 0 + x = -11.789826123 + 13 x = -11.789826123 + 13 Combine like terms: -11.789826123 + 13 = 1.210173877 x = 1.210173877 Simplifying x = 1.210173877

Solution

The solution to the problem is based on the solutions from the subproblems. x = {24.789826123, 1.210173877}

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