(x^2+7x-6)+(-6x^2-3x+1)+(x^2-x-9)=

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Solution for (x^2+7x-6)+(-6x^2-3x+1)+(x^2-x-9)= equation:


Simplifying
(x2 + 7x + -6) + (-6x2 + -3x + 1) + (x2 + -1x + -9) = 0

Reorder the terms:
(-6 + 7x + x2) + (-6x2 + -3x + 1) + (x2 + -1x + -9) = 0

Remove parenthesis around (-6 + 7x + x2)
-6 + 7x + x2 + (-6x2 + -3x + 1) + (x2 + -1x + -9) = 0

Reorder the terms:
-6 + 7x + x2 + (1 + -3x + -6x2) + (x2 + -1x + -9) = 0

Remove parenthesis around (1 + -3x + -6x2)
-6 + 7x + x2 + 1 + -3x + -6x2 + (x2 + -1x + -9) = 0

Reorder the terms:
-6 + 7x + x2 + 1 + -3x + -6x2 + (-9 + -1x + x2) = 0

Remove parenthesis around (-9 + -1x + x2)
-6 + 7x + x2 + 1 + -3x + -6x2 + -9 + -1x + x2 = 0

Reorder the terms:
-6 + 1 + -9 + 7x + -3x + -1x + x2 + -6x2 + x2 = 0

Combine like terms: -6 + 1 = -5
-5 + -9 + 7x + -3x + -1x + x2 + -6x2 + x2 = 0

Combine like terms: -5 + -9 = -14
-14 + 7x + -3x + -1x + x2 + -6x2 + x2 = 0

Combine like terms: 7x + -3x = 4x
-14 + 4x + -1x + x2 + -6x2 + x2 = 0

Combine like terms: 4x + -1x = 3x
-14 + 3x + x2 + -6x2 + x2 = 0

Combine like terms: x2 + -6x2 = -5x2
-14 + 3x + -5x2 + x2 = 0

Combine like terms: -5x2 + x2 = -4x2
-14 + 3x + -4x2 = 0

Solving
-14 + 3x + -4x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-4 the coefficient of the squared term: 

Divide each side by '-4'.
3.5 + -0.75x + x2 = 0

Move the constant term to the right:

Add '-3.5' to each side of the equation.
3.5 + -0.75x + -3.5 + x2 = 0 + -3.5

Reorder the terms:
3.5 + -3.5 + -0.75x + x2 = 0 + -3.5

Combine like terms: 3.5 + -3.5 = 0.0
0.0 + -0.75x + x2 = 0 + -3.5
-0.75x + x2 = 0 + -3.5

Combine like terms: 0 + -3.5 = -3.5
-0.75x + x2 = -3.5

The x term is -0.75x.  Take half its coefficient (-0.375).
Square it (0.140625) and add it to both sides.

Add '0.140625' to each side of the equation.
-0.75x + 0.140625 + x2 = -3.5 + 0.140625

Reorder the terms:
0.140625 + -0.75x + x2 = -3.5 + 0.140625

Combine like terms: -3.5 + 0.140625 = -3.359375
0.140625 + -0.75x + x2 = -3.359375

Factor a perfect square on the left side:
(x + -0.375)(x + -0.375) = -3.359375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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