x^2-9x-26=2x+4

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Solution for x^2-9x-26=2x+4 equation:


Simplifying
x2 + -9x + -26 = 2x + 4

Reorder the terms:
-26 + -9x + x2 = 2x + 4

Reorder the terms:
-26 + -9x + x2 = 4 + 2x

Solving
-26 + -9x + x2 = 4 + 2x

Solving for variable 'x'.

Reorder the terms:
-26 + -4 + -9x + -2x + x2 = 4 + 2x + -4 + -2x

Combine like terms: -26 + -4 = -30
-30 + -9x + -2x + x2 = 4 + 2x + -4 + -2x

Combine like terms: -9x + -2x = -11x
-30 + -11x + x2 = 4 + 2x + -4 + -2x

Reorder the terms:
-30 + -11x + x2 = 4 + -4 + 2x + -2x

Combine like terms: 4 + -4 = 0
-30 + -11x + x2 = 0 + 2x + -2x
-30 + -11x + x2 = 2x + -2x

Combine like terms: 2x + -2x = 0
-30 + -11x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '30' to each side of the equation.
-30 + -11x + 30 + x2 = 0 + 30

Reorder the terms:
-30 + 30 + -11x + x2 = 0 + 30

Combine like terms: -30 + 30 = 0
0 + -11x + x2 = 0 + 30
-11x + x2 = 0 + 30

Combine like terms: 0 + 30 = 30
-11x + x2 = 30

The x term is -11x.  Take half its coefficient (-5.5).
Square it (30.25) and add it to both sides.

Add '30.25' to each side of the equation.
-11x + 30.25 + x2 = 30 + 30.25

Reorder the terms:
30.25 + -11x + x2 = 30 + 30.25

Combine like terms: 30 + 30.25 = 60.25
30.25 + -11x + x2 = 60.25

Factor a perfect square on the left side:
(x + -5.5)(x + -5.5) = 60.25

Calculate the square root of the right side: 7.762087348

Break this problem into two subproblems by setting 
(x + -5.5) equal to 7.762087348 and -7.762087348.

Subproblem 1

x + -5.5 = 7.762087348 Simplifying x + -5.5 = 7.762087348 Reorder the terms: -5.5 + x = 7.762087348 Solving -5.5 + x = 7.762087348 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + x = 7.762087348 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = 7.762087348 + 5.5 x = 7.762087348 + 5.5 Combine like terms: 7.762087348 + 5.5 = 13.262087348 x = 13.262087348 Simplifying x = 13.262087348

Subproblem 2

x + -5.5 = -7.762087348 Simplifying x + -5.5 = -7.762087348 Reorder the terms: -5.5 + x = -7.762087348 Solving -5.5 + x = -7.762087348 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + x = -7.762087348 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = -7.762087348 + 5.5 x = -7.762087348 + 5.5 Combine like terms: -7.762087348 + 5.5 = -2.262087348 x = -2.262087348 Simplifying x = -2.262087348

Solution

The solution to the problem is based on the solutions from the subproblems. x = {13.262087348, -2.262087348}

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