(8x^2-8x)-(-9x^2-2x+6)=0

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Solution for (8x^2-8x)-(-9x^2-2x+6)=0 equation:


Simplifying
(8x2 + -8x) + -1(-9x2 + -2x + 6) = 0

Reorder the terms:
(-8x + 8x2) + -1(-9x2 + -2x + 6) = 0

Remove parenthesis around (-8x + 8x2)
-8x + 8x2 + -1(-9x2 + -2x + 6) = 0

Reorder the terms:
-8x + 8x2 + -1(6 + -2x + -9x2) = 0
-8x + 8x2 + (6 * -1 + -2x * -1 + -9x2 * -1) = 0
-8x + 8x2 + (-6 + 2x + 9x2) = 0

Reorder the terms:
-6 + -8x + 2x + 8x2 + 9x2 = 0

Combine like terms: -8x + 2x = -6x
-6 + -6x + 8x2 + 9x2 = 0

Combine like terms: 8x2 + 9x2 = 17x2
-6 + -6x + 17x2 = 0

Solving
-6 + -6x + 17x2 = 0

Solving for variable 'x'.

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

Divide each side by '17'.
-0.3529411765 + -0.3529411765x + x2 = 0

Move the constant term to the right:

Add '0.3529411765' to each side of the equation.
-0.3529411765 + -0.3529411765x + 0.3529411765 + x2 = 0 + 0.3529411765

Reorder the terms:
-0.3529411765 + 0.3529411765 + -0.3529411765x + x2 = 0 + 0.3529411765

Combine like terms: -0.3529411765 + 0.3529411765 = 0.0000000000
0.0000000000 + -0.3529411765x + x2 = 0 + 0.3529411765
-0.3529411765x + x2 = 0 + 0.3529411765

Combine like terms: 0 + 0.3529411765 = 0.3529411765
-0.3529411765x + x2 = 0.3529411765

The x term is -0.3529411765x.  Take half its coefficient (-0.1764705883).
Square it (0.03114186853) and add it to both sides.

Add '0.03114186853' to each side of the equation.
-0.3529411765x + 0.03114186853 + x2 = 0.3529411765 + 0.03114186853

Reorder the terms:
0.03114186853 + -0.3529411765x + x2 = 0.3529411765 + 0.03114186853

Combine like terms: 0.3529411765 + 0.03114186853 = 0.38408304503
0.03114186853 + -0.3529411765x + x2 = 0.38408304503

Factor a perfect square on the left side:
(x + -0.1764705883)(x + -0.1764705883) = 0.38408304503

Calculate the square root of the right side: 0.619744338

Break this problem into two subproblems by setting 
(x + -0.1764705883) equal to 0.619744338 and -0.619744338.

Subproblem 1

x + -0.1764705883 = 0.619744338 Simplifying x + -0.1764705883 = 0.619744338 Reorder the terms: -0.1764705883 + x = 0.619744338 Solving -0.1764705883 + x = 0.619744338 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1764705883' to each side of the equation. -0.1764705883 + 0.1764705883 + x = 0.619744338 + 0.1764705883 Combine like terms: -0.1764705883 + 0.1764705883 = 0.0000000000 0.0000000000 + x = 0.619744338 + 0.1764705883 x = 0.619744338 + 0.1764705883 Combine like terms: 0.619744338 + 0.1764705883 = 0.7962149263 x = 0.7962149263 Simplifying x = 0.7962149263

Subproblem 2

x + -0.1764705883 = -0.619744338 Simplifying x + -0.1764705883 = -0.619744338 Reorder the terms: -0.1764705883 + x = -0.619744338 Solving -0.1764705883 + x = -0.619744338 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1764705883' to each side of the equation. -0.1764705883 + 0.1764705883 + x = -0.619744338 + 0.1764705883 Combine like terms: -0.1764705883 + 0.1764705883 = 0.0000000000 0.0000000000 + x = -0.619744338 + 0.1764705883 x = -0.619744338 + 0.1764705883 Combine like terms: -0.619744338 + 0.1764705883 = -0.4432737497 x = -0.4432737497 Simplifying x = -0.4432737497

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.7962149263, -0.4432737497}

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