0=x^2-13x-60

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Solution for 0=x^2-13x-60 equation:


Simplifying
0 = x2 + -13x + -60

Reorder the terms:
0 = -60 + -13x + x2

Solving
0 = -60 + -13x + x2

Solving for variable 'x'.

Combine like terms: 0 + 60 = 60
60 + 13x + -1x2 = -60 + -13x + x2 + 60 + 13x + -1x2

Reorder the terms:
60 + 13x + -1x2 = -60 + 60 + -13x + 13x + x2 + -1x2

Combine like terms: -60 + 60 = 0
60 + 13x + -1x2 = 0 + -13x + 13x + x2 + -1x2
60 + 13x + -1x2 = -13x + 13x + x2 + -1x2

Combine like terms: -13x + 13x = 0
60 + 13x + -1x2 = 0 + x2 + -1x2
60 + 13x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
60 + 13x + -1x2 = 0

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

Divide each side by '-1'.
-60 + -13x + x2 = 0

Move the constant term to the right:

Add '60' to each side of the equation.
-60 + -13x + 60 + x2 = 0 + 60

Reorder the terms:
-60 + 60 + -13x + x2 = 0 + 60

Combine like terms: -60 + 60 = 0
0 + -13x + x2 = 0 + 60
-13x + x2 = 0 + 60

Combine like terms: 0 + 60 = 60
-13x + x2 = 60

The x term is -13x.  Take half its coefficient (-6.5).
Square it (42.25) and add it to both sides.

Add '42.25' to each side of the equation.
-13x + 42.25 + x2 = 60 + 42.25

Reorder the terms:
42.25 + -13x + x2 = 60 + 42.25

Combine like terms: 60 + 42.25 = 102.25
42.25 + -13x + x2 = 102.25

Factor a perfect square on the left side:
(x + -6.5)(x + -6.5) = 102.25

Calculate the square root of the right side: 10.111874208

Break this problem into two subproblems by setting 
(x + -6.5) equal to 10.111874208 and -10.111874208.

Subproblem 1

x + -6.5 = 10.111874208 Simplifying x + -6.5 = 10.111874208 Reorder the terms: -6.5 + x = 10.111874208 Solving -6.5 + x = 10.111874208 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.5' to each side of the equation. -6.5 + 6.5 + x = 10.111874208 + 6.5 Combine like terms: -6.5 + 6.5 = 0.0 0.0 + x = 10.111874208 + 6.5 x = 10.111874208 + 6.5 Combine like terms: 10.111874208 + 6.5 = 16.611874208 x = 16.611874208 Simplifying x = 16.611874208

Subproblem 2

x + -6.5 = -10.111874208 Simplifying x + -6.5 = -10.111874208 Reorder the terms: -6.5 + x = -10.111874208 Solving -6.5 + x = -10.111874208 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.5' to each side of the equation. -6.5 + 6.5 + x = -10.111874208 + 6.5 Combine like terms: -6.5 + 6.5 = 0.0 0.0 + x = -10.111874208 + 6.5 x = -10.111874208 + 6.5 Combine like terms: -10.111874208 + 6.5 = -3.611874208 x = -3.611874208 Simplifying x = -3.611874208

Solution

The solution to the problem is based on the solutions from the subproblems. x = {16.611874208, -3.611874208}

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