x^2-10x-25+2x^2+x-2x-1=13x+26

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Solution for x^2-10x-25+2x^2+x-2x-1=13x+26 equation:


Simplifying
x2 + -10x + -25 + 2x2 + x + -2x + -1 = 13x + 26

Reorder the terms:
-25 + -1 + -10x + x + -2x + x2 + 2x2 = 13x + 26

Combine like terms: -25 + -1 = -26
-26 + -10x + x + -2x + x2 + 2x2 = 13x + 26

Combine like terms: -10x + x = -9x
-26 + -9x + -2x + x2 + 2x2 = 13x + 26

Combine like terms: -9x + -2x = -11x
-26 + -11x + x2 + 2x2 = 13x + 26

Combine like terms: x2 + 2x2 = 3x2
-26 + -11x + 3x2 = 13x + 26

Reorder the terms:
-26 + -11x + 3x2 = 26 + 13x

Solving
-26 + -11x + 3x2 = 26 + 13x

Solving for variable 'x'.

Reorder the terms:
-26 + -26 + -11x + -13x + 3x2 = 26 + 13x + -26 + -13x

Combine like terms: -26 + -26 = -52
-52 + -11x + -13x + 3x2 = 26 + 13x + -26 + -13x

Combine like terms: -11x + -13x = -24x
-52 + -24x + 3x2 = 26 + 13x + -26 + -13x

Reorder the terms:
-52 + -24x + 3x2 = 26 + -26 + 13x + -13x

Combine like terms: 26 + -26 = 0
-52 + -24x + 3x2 = 0 + 13x + -13x
-52 + -24x + 3x2 = 13x + -13x

Combine like terms: 13x + -13x = 0
-52 + -24x + 3x2 = 0

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

Divide each side by '3'.
-17.33333333 + -8x + x2 = 0

Move the constant term to the right:

Add '17.33333333' to each side of the equation.
-17.33333333 + -8x + 17.33333333 + x2 = 0 + 17.33333333

Reorder the terms:
-17.33333333 + 17.33333333 + -8x + x2 = 0 + 17.33333333

Combine like terms: -17.33333333 + 17.33333333 = 0.00000000
0.00000000 + -8x + x2 = 0 + 17.33333333
-8x + x2 = 0 + 17.33333333

Combine like terms: 0 + 17.33333333 = 17.33333333
-8x + x2 = 17.33333333

The x term is -8x.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8x + 16 + x2 = 17.33333333 + 16

Reorder the terms:
16 + -8x + x2 = 17.33333333 + 16

Combine like terms: 17.33333333 + 16 = 33.33333333
16 + -8x + x2 = 33.33333333

Factor a perfect square on the left side:
(x + -4)(x + -4) = 33.33333333

Calculate the square root of the right side: 5.773502692

Break this problem into two subproblems by setting 
(x + -4) equal to 5.773502692 and -5.773502692.

Subproblem 1

x + -4 = 5.773502692 Simplifying x + -4 = 5.773502692 Reorder the terms: -4 + x = 5.773502692 Solving -4 + x = 5.773502692 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = 5.773502692 + 4 Combine like terms: -4 + 4 = 0 0 + x = 5.773502692 + 4 x = 5.773502692 + 4 Combine like terms: 5.773502692 + 4 = 9.773502692 x = 9.773502692 Simplifying x = 9.773502692

Subproblem 2

x + -4 = -5.773502692 Simplifying x + -4 = -5.773502692 Reorder the terms: -4 + x = -5.773502692 Solving -4 + x = -5.773502692 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = -5.773502692 + 4 Combine like terms: -4 + 4 = 0 0 + x = -5.773502692 + 4 x = -5.773502692 + 4 Combine like terms: -5.773502692 + 4 = -1.773502692 x = -1.773502692 Simplifying x = -1.773502692

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.773502692, -1.773502692}

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