3x^2+2x-1-8x^2=-12x^2-8x-6

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Solution for 3x^2+2x-1-8x^2=-12x^2-8x-6 equation:


Simplifying
3x2 + 2x + -1 + -8x2 = -12x2 + -8x + -6

Reorder the terms:
-1 + 2x + 3x2 + -8x2 = -12x2 + -8x + -6

Combine like terms: 3x2 + -8x2 = -5x2
-1 + 2x + -5x2 = -12x2 + -8x + -6

Reorder the terms:
-1 + 2x + -5x2 = -6 + -8x + -12x2

Solving
-1 + 2x + -5x2 = -6 + -8x + -12x2

Solving for variable 'x'.

Reorder the terms:
-1 + 6 + 2x + 8x + -5x2 + 12x2 = -6 + -8x + -12x2 + 6 + 8x + 12x2

Combine like terms: -1 + 6 = 5
5 + 2x + 8x + -5x2 + 12x2 = -6 + -8x + -12x2 + 6 + 8x + 12x2

Combine like terms: 2x + 8x = 10x
5 + 10x + -5x2 + 12x2 = -6 + -8x + -12x2 + 6 + 8x + 12x2

Combine like terms: -5x2 + 12x2 = 7x2
5 + 10x + 7x2 = -6 + -8x + -12x2 + 6 + 8x + 12x2

Reorder the terms:
5 + 10x + 7x2 = -6 + 6 + -8x + 8x + -12x2 + 12x2

Combine like terms: -6 + 6 = 0
5 + 10x + 7x2 = 0 + -8x + 8x + -12x2 + 12x2
5 + 10x + 7x2 = -8x + 8x + -12x2 + 12x2

Combine like terms: -8x + 8x = 0
5 + 10x + 7x2 = 0 + -12x2 + 12x2
5 + 10x + 7x2 = -12x2 + 12x2

Combine like terms: -12x2 + 12x2 = 0
5 + 10x + 7x2 = 0

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

Divide each side by '7'.
0.7142857143 + 1.428571429x + x2 = 0

Move the constant term to the right:

Add '-0.7142857143' to each side of the equation.
0.7142857143 + 1.428571429x + -0.7142857143 + x2 = 0 + -0.7142857143

Reorder the terms:
0.7142857143 + -0.7142857143 + 1.428571429x + x2 = 0 + -0.7142857143

Combine like terms: 0.7142857143 + -0.7142857143 = 0.0000000000
0.0000000000 + 1.428571429x + x2 = 0 + -0.7142857143
1.428571429x + x2 = 0 + -0.7142857143

Combine like terms: 0 + -0.7142857143 = -0.7142857143
1.428571429x + x2 = -0.7142857143

The x term is 1.428571429x.  Take half its coefficient (0.7142857145).
Square it (0.5102040819) and add it to both sides.

Add '0.5102040819' to each side of the equation.
1.428571429x + 0.5102040819 + x2 = -0.7142857143 + 0.5102040819

Reorder the terms:
0.5102040819 + 1.428571429x + x2 = -0.7142857143 + 0.5102040819

Combine like terms: -0.7142857143 + 0.5102040819 = -0.2040816324
0.5102040819 + 1.428571429x + x2 = -0.2040816324

Factor a perfect square on the left side:
(x + 0.7142857145)(x + 0.7142857145) = -0.2040816324

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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