2x+(3x^2-6x+7-5+3x^2+6)-(4x^2-7x-6)=0

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Solution for 2x+(3x^2-6x+7-5+3x^2+6)-(4x^2-7x-6)=0 equation:


Simplifying
2x + (3x2 + -6x + 7 + -5 + 3x2 + 6) + -1(4x2 + -7x + -6) = 0

Reorder the terms:
2x + (7 + -5 + 6 + -6x + 3x2 + 3x2) + -1(4x2 + -7x + -6) = 0

Combine like terms: 7 + -5 = 2
2x + (2 + 6 + -6x + 3x2 + 3x2) + -1(4x2 + -7x + -6) = 0

Combine like terms: 2 + 6 = 8
2x + (8 + -6x + 3x2 + 3x2) + -1(4x2 + -7x + -6) = 0

Combine like terms: 3x2 + 3x2 = 6x2
2x + (8 + -6x + 6x2) + -1(4x2 + -7x + -6) = 0

Remove parenthesis around (8 + -6x + 6x2)
2x + 8 + -6x + 6x2 + -1(4x2 + -7x + -6) = 0

Reorder the terms:
2x + 8 + -6x + 6x2 + -1(-6 + -7x + 4x2) = 0
2x + 8 + -6x + 6x2 + (-6 * -1 + -7x * -1 + 4x2 * -1) = 0
2x + 8 + -6x + 6x2 + (6 + 7x + -4x2) = 0

Reorder the terms:
8 + 6 + 2x + -6x + 7x + 6x2 + -4x2 = 0

Combine like terms: 8 + 6 = 14
14 + 2x + -6x + 7x + 6x2 + -4x2 = 0

Combine like terms: 2x + -6x = -4x
14 + -4x + 7x + 6x2 + -4x2 = 0

Combine like terms: -4x + 7x = 3x
14 + 3x + 6x2 + -4x2 = 0

Combine like terms: 6x2 + -4x2 = 2x2
14 + 3x + 2x2 = 0

Solving
14 + 3x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
7 + 1.5x + x2 = 0

Move the constant term to the right:

Add '-7' to each side of the equation.
7 + 1.5x + -7 + x2 = 0 + -7

Reorder the terms:
7 + -7 + 1.5x + x2 = 0 + -7

Combine like terms: 7 + -7 = 0
0 + 1.5x + x2 = 0 + -7
1.5x + x2 = 0 + -7

Combine like terms: 0 + -7 = -7
1.5x + x2 = -7

The x term is 1.5x.  Take half its coefficient (0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
1.5x + 0.5625 + x2 = -7 + 0.5625

Reorder the terms:
0.5625 + 1.5x + x2 = -7 + 0.5625

Combine like terms: -7 + 0.5625 = -6.4375
0.5625 + 1.5x + x2 = -6.4375

Factor a perfect square on the left side:
(x + 0.75)(x + 0.75) = -6.4375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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