x^2=13x+6

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Solution for x^2=13x+6 equation:


Simplifying
x2 = 13x + 6

Reorder the terms:
x2 = 6 + 13x

Solving
x2 = 6 + 13x

Solving for variable 'x'.

Reorder the terms:
-6 + -13x + x2 = 6 + 13x + -6 + -13x

Reorder the terms:
-6 + -13x + x2 = 6 + -6 + 13x + -13x

Combine like terms: 6 + -6 = 0
-6 + -13x + x2 = 0 + 13x + -13x
-6 + -13x + x2 = 13x + -13x

Combine like terms: 13x + -13x = 0
-6 + -13x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '6' to each side of the equation.
-6 + -13x + 6 + x2 = 0 + 6

Reorder the terms:
-6 + 6 + -13x + x2 = 0 + 6

Combine like terms: -6 + 6 = 0
0 + -13x + x2 = 0 + 6
-13x + x2 = 0 + 6

Combine like terms: 0 + 6 = 6
-13x + x2 = 6

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 = 6 + 42.25

Reorder the terms:
42.25 + -13x + x2 = 6 + 42.25

Combine like terms: 6 + 42.25 = 48.25
42.25 + -13x + x2 = 48.25

Factor a perfect square on the left side:
(x + -6.5)(x + -6.5) = 48.25

Calculate the square root of the right side: 6.946221995

Break this problem into two subproblems by setting 
(x + -6.5) equal to 6.946221995 and -6.946221995.

Subproblem 1

x + -6.5 = 6.946221995 Simplifying x + -6.5 = 6.946221995 Reorder the terms: -6.5 + x = 6.946221995 Solving -6.5 + x = 6.946221995 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 = 6.946221995 + 6.5 Combine like terms: -6.5 + 6.5 = 0.0 0.0 + x = 6.946221995 + 6.5 x = 6.946221995 + 6.5 Combine like terms: 6.946221995 + 6.5 = 13.446221995 x = 13.446221995 Simplifying x = 13.446221995

Subproblem 2

x + -6.5 = -6.946221995 Simplifying x + -6.5 = -6.946221995 Reorder the terms: -6.5 + x = -6.946221995 Solving -6.5 + x = -6.946221995 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 = -6.946221995 + 6.5 Combine like terms: -6.5 + 6.5 = 0.0 0.0 + x = -6.946221995 + 6.5 x = -6.946221995 + 6.5 Combine like terms: -6.946221995 + 6.5 = -0.446221995 x = -0.446221995 Simplifying x = -0.446221995

Solution

The solution to the problem is based on the solutions from the subproblems. x = {13.446221995, -0.446221995}

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