(-11x^2+6x+6)+(-5x^2+3x+2)=0

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Solution for (-11x^2+6x+6)+(-5x^2+3x+2)=0 equation:


Simplifying
(-11x2 + 6x + 6) + (-5x2 + 3x + 2) = 0

Reorder the terms:
(6 + 6x + -11x2) + (-5x2 + 3x + 2) = 0

Remove parenthesis around (6 + 6x + -11x2)
6 + 6x + -11x2 + (-5x2 + 3x + 2) = 0

Reorder the terms:
6 + 6x + -11x2 + (2 + 3x + -5x2) = 0

Remove parenthesis around (2 + 3x + -5x2)
6 + 6x + -11x2 + 2 + 3x + -5x2 = 0

Reorder the terms:
6 + 2 + 6x + 3x + -11x2 + -5x2 = 0

Combine like terms: 6 + 2 = 8
8 + 6x + 3x + -11x2 + -5x2 = 0

Combine like terms: 6x + 3x = 9x
8 + 9x + -11x2 + -5x2 = 0

Combine like terms: -11x2 + -5x2 = -16x2
8 + 9x + -16x2 = 0

Solving
8 + 9x + -16x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-16 the coefficient of the squared term: 

Divide each side by '-16'.
-0.5 + -0.5625x + x2 = 0

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + -0.5625x + 0.5 + x2 = 0 + 0.5

Reorder the terms:
-0.5 + 0.5 + -0.5625x + x2 = 0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + -0.5625x + x2 = 0 + 0.5
-0.5625x + x2 = 0 + 0.5

Combine like terms: 0 + 0.5 = 0.5
-0.5625x + x2 = 0.5

The x term is -0.5625x.  Take half its coefficient (-0.28125).
Square it (0.0791015625) and add it to both sides.

Add '0.0791015625' to each side of the equation.
-0.5625x + 0.0791015625 + x2 = 0.5 + 0.0791015625

Reorder the terms:
0.0791015625 + -0.5625x + x2 = 0.5 + 0.0791015625

Combine like terms: 0.5 + 0.0791015625 = 0.5791015625
0.0791015625 + -0.5625x + x2 = 0.5791015625

Factor a perfect square on the left side:
(x + -0.28125)(x + -0.28125) = 0.5791015625

Calculate the square root of the right side: 0.760987229

Break this problem into two subproblems by setting 
(x + -0.28125) equal to 0.760987229 and -0.760987229.

Subproblem 1

x + -0.28125 = 0.760987229 Simplifying x + -0.28125 = 0.760987229 Reorder the terms: -0.28125 + x = 0.760987229 Solving -0.28125 + x = 0.760987229 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.28125' to each side of the equation. -0.28125 + 0.28125 + x = 0.760987229 + 0.28125 Combine like terms: -0.28125 + 0.28125 = 0.00000 0.00000 + x = 0.760987229 + 0.28125 x = 0.760987229 + 0.28125 Combine like terms: 0.760987229 + 0.28125 = 1.042237229 x = 1.042237229 Simplifying x = 1.042237229

Subproblem 2

x + -0.28125 = -0.760987229 Simplifying x + -0.28125 = -0.760987229 Reorder the terms: -0.28125 + x = -0.760987229 Solving -0.28125 + x = -0.760987229 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.28125' to each side of the equation. -0.28125 + 0.28125 + x = -0.760987229 + 0.28125 Combine like terms: -0.28125 + 0.28125 = 0.00000 0.00000 + x = -0.760987229 + 0.28125 x = -0.760987229 + 0.28125 Combine like terms: -0.760987229 + 0.28125 = -0.479737229 x = -0.479737229 Simplifying x = -0.479737229

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.042237229, -0.479737229}

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