x^2-5x-6=36

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Solution for x^2-5x-6=36 equation:


Simplifying
x2 + -5x + -6 = 36

Reorder the terms:
-6 + -5x + x2 = 36

Solving
-6 + -5x + x2 = 36

Solving for variable 'x'.

Reorder the terms:
-6 + -36 + -5x + x2 = 36 + -36

Combine like terms: -6 + -36 = -42
-42 + -5x + x2 = 36 + -36

Combine like terms: 36 + -36 = 0
-42 + -5x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '42' to each side of the equation.
-42 + -5x + 42 + x2 = 0 + 42

Reorder the terms:
-42 + 42 + -5x + x2 = 0 + 42

Combine like terms: -42 + 42 = 0
0 + -5x + x2 = 0 + 42
-5x + x2 = 0 + 42

Combine like terms: 0 + 42 = 42
-5x + x2 = 42

The x term is -5x.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5x + 6.25 + x2 = 42 + 6.25

Reorder the terms:
6.25 + -5x + x2 = 42 + 6.25

Combine like terms: 42 + 6.25 = 48.25
6.25 + -5x + x2 = 48.25

Factor a perfect square on the left side:
(x + -2.5)(x + -2.5) = 48.25

Calculate the square root of the right side: 6.946221995

Break this problem into two subproblems by setting 
(x + -2.5) equal to 6.946221995 and -6.946221995.

Subproblem 1

x + -2.5 = 6.946221995 Simplifying x + -2.5 = 6.946221995 Reorder the terms: -2.5 + x = 6.946221995 Solving -2.5 + x = 6.946221995 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = 6.946221995 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = 6.946221995 + 2.5 x = 6.946221995 + 2.5 Combine like terms: 6.946221995 + 2.5 = 9.446221995 x = 9.446221995 Simplifying x = 9.446221995

Subproblem 2

x + -2.5 = -6.946221995 Simplifying x + -2.5 = -6.946221995 Reorder the terms: -2.5 + x = -6.946221995 Solving -2.5 + x = -6.946221995 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = -6.946221995 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = -6.946221995 + 2.5 x = -6.946221995 + 2.5 Combine like terms: -6.946221995 + 2.5 = -4.446221995 x = -4.446221995 Simplifying x = -4.446221995

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.446221995, -4.446221995}

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