0=x^2-25x+130

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Solution for 0=x^2-25x+130 equation:


Simplifying
0 = x2 + -25x + 130

Reorder the terms:
0 = 130 + -25x + x2

Solving
0 = 130 + -25x + x2

Solving for variable 'x'.

Combine like terms: 0 + -130 = -130
-130 + 25x + -1x2 = 130 + -25x + x2 + -130 + 25x + -1x2

Reorder the terms:
-130 + 25x + -1x2 = 130 + -130 + -25x + 25x + x2 + -1x2

Combine like terms: 130 + -130 = 0
-130 + 25x + -1x2 = 0 + -25x + 25x + x2 + -1x2
-130 + 25x + -1x2 = -25x + 25x + x2 + -1x2

Combine like terms: -25x + 25x = 0
-130 + 25x + -1x2 = 0 + x2 + -1x2
-130 + 25x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-130 + 25x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
130 + -25x + x2 = 0

Move the constant term to the right:

Add '-130' to each side of the equation.
130 + -25x + -130 + x2 = 0 + -130

Reorder the terms:
130 + -130 + -25x + x2 = 0 + -130

Combine like terms: 130 + -130 = 0
0 + -25x + x2 = 0 + -130
-25x + x2 = 0 + -130

Combine like terms: 0 + -130 = -130
-25x + x2 = -130

The x term is -25x.  Take half its coefficient (-12.5).
Square it (156.25) and add it to both sides.

Add '156.25' to each side of the equation.
-25x + 156.25 + x2 = -130 + 156.25

Reorder the terms:
156.25 + -25x + x2 = -130 + 156.25

Combine like terms: -130 + 156.25 = 26.25
156.25 + -25x + x2 = 26.25

Factor a perfect square on the left side:
(x + -12.5)(x + -12.5) = 26.25

Calculate the square root of the right side: 5.123475383

Break this problem into two subproblems by setting 
(x + -12.5) equal to 5.123475383 and -5.123475383.

Subproblem 1

x + -12.5 = 5.123475383 Simplifying x + -12.5 = 5.123475383 Reorder the terms: -12.5 + x = 5.123475383 Solving -12.5 + x = 5.123475383 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12.5' to each side of the equation. -12.5 + 12.5 + x = 5.123475383 + 12.5 Combine like terms: -12.5 + 12.5 = 0.0 0.0 + x = 5.123475383 + 12.5 x = 5.123475383 + 12.5 Combine like terms: 5.123475383 + 12.5 = 17.623475383 x = 17.623475383 Simplifying x = 17.623475383

Subproblem 2

x + -12.5 = -5.123475383 Simplifying x + -12.5 = -5.123475383 Reorder the terms: -12.5 + x = -5.123475383 Solving -12.5 + x = -5.123475383 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12.5' to each side of the equation. -12.5 + 12.5 + x = -5.123475383 + 12.5 Combine like terms: -12.5 + 12.5 = 0.0 0.0 + x = -5.123475383 + 12.5 x = -5.123475383 + 12.5 Combine like terms: -5.123475383 + 12.5 = 7.376524617 x = 7.376524617 Simplifying x = 7.376524617

Solution

The solution to the problem is based on the solutions from the subproblems. x = {17.623475383, 7.376524617}

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