2x^2-5x-7-6x+9-x^2=

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Solution for 2x^2-5x-7-6x+9-x^2= equation:


Simplifying
2x2 + -5x + -7 + -6x + 9 + -1x2 = 0

Reorder the terms:
-7 + 9 + -5x + -6x + 2x2 + -1x2 = 0

Combine like terms: -7 + 9 = 2
2 + -5x + -6x + 2x2 + -1x2 = 0

Combine like terms: -5x + -6x = -11x
2 + -11x + 2x2 + -1x2 = 0

Combine like terms: 2x2 + -1x2 = 1x2
2 + -11x + 1x2 = 0

Solving
2 + -11x + 1x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-2' to each side of the equation.
2 + -11x + -2 + x2 = 0 + -2

Reorder the terms:
2 + -2 + -11x + x2 = 0 + -2

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

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

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 = -2 + 30.25

Reorder the terms:
30.25 + -11x + x2 = -2 + 30.25

Combine like terms: -2 + 30.25 = 28.25
30.25 + -11x + x2 = 28.25

Factor a perfect square on the left side:
(x + -5.5)(x + -5.5) = 28.25

Calculate the square root of the right side: 5.315072906

Break this problem into two subproblems by setting 
(x + -5.5) equal to 5.315072906 and -5.315072906.

Subproblem 1

x + -5.5 = 5.315072906 Simplifying x + -5.5 = 5.315072906 Reorder the terms: -5.5 + x = 5.315072906 Solving -5.5 + x = 5.315072906 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 = 5.315072906 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = 5.315072906 + 5.5 x = 5.315072906 + 5.5 Combine like terms: 5.315072906 + 5.5 = 10.815072906 x = 10.815072906 Simplifying x = 10.815072906

Subproblem 2

x + -5.5 = -5.315072906 Simplifying x + -5.5 = -5.315072906 Reorder the terms: -5.5 + x = -5.315072906 Solving -5.5 + x = -5.315072906 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 = -5.315072906 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = -5.315072906 + 5.5 x = -5.315072906 + 5.5 Combine like terms: -5.315072906 + 5.5 = 0.184927094 x = 0.184927094 Simplifying x = 0.184927094

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.815072906, 0.184927094}

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