x^2-3x-36=2x-2

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Solution for x^2-3x-36=2x-2 equation:


Simplifying
x2 + -3x + -36 = 2x + -2

Reorder the terms:
-36 + -3x + x2 = 2x + -2

Reorder the terms:
-36 + -3x + x2 = -2 + 2x

Solving
-36 + -3x + x2 = -2 + 2x

Solving for variable 'x'.

Reorder the terms:
-36 + 2 + -3x + -2x + x2 = -2 + 2x + 2 + -2x

Combine like terms: -36 + 2 = -34
-34 + -3x + -2x + x2 = -2 + 2x + 2 + -2x

Combine like terms: -3x + -2x = -5x
-34 + -5x + x2 = -2 + 2x + 2 + -2x

Reorder the terms:
-34 + -5x + x2 = -2 + 2 + 2x + -2x

Combine like terms: -2 + 2 = 0
-34 + -5x + x2 = 0 + 2x + -2x
-34 + -5x + x2 = 2x + -2x

Combine like terms: 2x + -2x = 0
-34 + -5x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '34' to each side of the equation.
-34 + -5x + 34 + x2 = 0 + 34

Reorder the terms:
-34 + 34 + -5x + x2 = 0 + 34

Combine like terms: -34 + 34 = 0
0 + -5x + x2 = 0 + 34
-5x + x2 = 0 + 34

Combine like terms: 0 + 34 = 34
-5x + x2 = 34

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 = 34 + 6.25

Reorder the terms:
6.25 + -5x + x2 = 34 + 6.25

Combine like terms: 34 + 6.25 = 40.25
6.25 + -5x + x2 = 40.25

Factor a perfect square on the left side:
(x + -2.5)(x + -2.5) = 40.25

Calculate the square root of the right side: 6.34428877

Break this problem into two subproblems by setting 
(x + -2.5) equal to 6.34428877 and -6.34428877.

Subproblem 1

x + -2.5 = 6.34428877 Simplifying x + -2.5 = 6.34428877 Reorder the terms: -2.5 + x = 6.34428877 Solving -2.5 + x = 6.34428877 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 = 6.34428877 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = 6.34428877 + 2.5 x = 6.34428877 + 2.5 Combine like terms: 6.34428877 + 2.5 = 8.84428877 x = 8.84428877 Simplifying x = 8.84428877

Subproblem 2

x + -2.5 = -6.34428877 Simplifying x + -2.5 = -6.34428877 Reorder the terms: -2.5 + x = -6.34428877 Solving -2.5 + x = -6.34428877 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 = -6.34428877 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = -6.34428877 + 2.5 x = -6.34428877 + 2.5 Combine like terms: -6.34428877 + 2.5 = -3.84428877 x = -3.84428877 Simplifying x = -3.84428877

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.84428877, -3.84428877}

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