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

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


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

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

Remove parenthesis around (6 + x + -2x2)
6 + x + -2x2 + (5x2 + -4x + -2) = 0

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

Remove parenthesis around (-2 + -4x + 5x2)
6 + x + -2x2 + -2 + -4x + 5x2 = 0

Reorder the terms:
6 + -2 + x + -4x + -2x2 + 5x2 = 0

Combine like terms: 6 + -2 = 4
4 + x + -4x + -2x2 + 5x2 = 0

Combine like terms: x + -4x = -3x
4 + -3x + -2x2 + 5x2 = 0

Combine like terms: -2x2 + 5x2 = 3x2
4 + -3x + 3x2 = 0

Solving
4 + -3x + 3x2 = 0

Solving for variable 'x'.

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

Divide each side by '3'.
1.333333333 + -1x + x2 = 0

Move the constant term to the right:

Add '-1.333333333' to each side of the equation.
1.333333333 + -1x + -1.333333333 + x2 = 0 + -1.333333333

Reorder the terms:
1.333333333 + -1.333333333 + -1x + x2 = 0 + -1.333333333

Combine like terms: 1.333333333 + -1.333333333 = 0.000000000
0.000000000 + -1x + x2 = 0 + -1.333333333
-1x + x2 = 0 + -1.333333333

Combine like terms: 0 + -1.333333333 = -1.333333333
-1x + x2 = -1.333333333

The x term is -1x.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1x + 0.25 + x2 = -1.333333333 + 0.25

Reorder the terms:
0.25 + -1x + x2 = -1.333333333 + 0.25

Combine like terms: -1.333333333 + 0.25 = -1.083333333
0.25 + -1x + x2 = -1.083333333

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = -1.083333333

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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