0=x^2-6x-5

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Solution for 0=x^2-6x-5 equation:


Simplifying
0 = x2 + -6x + -5

Reorder the terms:
0 = -5 + -6x + x2

Solving
0 = -5 + -6x + x2

Solving for variable 'x'.

Combine like terms: 0 + 5 = 5
5 + 6x + -1x2 = -5 + -6x + x2 + 5 + 6x + -1x2

Reorder the terms:
5 + 6x + -1x2 = -5 + 5 + -6x + 6x + x2 + -1x2

Combine like terms: -5 + 5 = 0
5 + 6x + -1x2 = 0 + -6x + 6x + x2 + -1x2
5 + 6x + -1x2 = -6x + 6x + x2 + -1x2

Combine like terms: -6x + 6x = 0
5 + 6x + -1x2 = 0 + x2 + -1x2
5 + 6x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
5 + 6x + -1x2 = 0

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

Divide each side by '-1'.
-5 + -6x + x2 = 0

Move the constant term to the right:

Add '5' to each side of the equation.
-5 + -6x + 5 + x2 = 0 + 5

Reorder the terms:
-5 + 5 + -6x + x2 = 0 + 5

Combine like terms: -5 + 5 = 0
0 + -6x + x2 = 0 + 5
-6x + x2 = 0 + 5

Combine like terms: 0 + 5 = 5
-6x + x2 = 5

The x term is -6x.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6x + 9 + x2 = 5 + 9

Reorder the terms:
9 + -6x + x2 = 5 + 9

Combine like terms: 5 + 9 = 14
9 + -6x + x2 = 14

Factor a perfect square on the left side:
(x + -3)(x + -3) = 14

Calculate the square root of the right side: 3.741657387

Break this problem into two subproblems by setting 
(x + -3) equal to 3.741657387 and -3.741657387.

Subproblem 1

x + -3 = 3.741657387 Simplifying x + -3 = 3.741657387 Reorder the terms: -3 + x = 3.741657387 Solving -3 + x = 3.741657387 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = 3.741657387 + 3 Combine like terms: -3 + 3 = 0 0 + x = 3.741657387 + 3 x = 3.741657387 + 3 Combine like terms: 3.741657387 + 3 = 6.741657387 x = 6.741657387 Simplifying x = 6.741657387

Subproblem 2

x + -3 = -3.741657387 Simplifying x + -3 = -3.741657387 Reorder the terms: -3 + x = -3.741657387 Solving -3 + x = -3.741657387 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = -3.741657387 + 3 Combine like terms: -3 + 3 = 0 0 + x = -3.741657387 + 3 x = -3.741657387 + 3 Combine like terms: -3.741657387 + 3 = -0.741657387 x = -0.741657387 Simplifying x = -0.741657387

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.741657387, -0.741657387}

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