(3y^2-2y-1)+(6y^2-5y+7)=

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Solution for (3y^2-2y-1)+(6y^2-5y+7)= equation:


Simplifying
(3y2 + -2y + -1) + (6y2 + -5y + 7) = 0

Reorder the terms:
(-1 + -2y + 3y2) + (6y2 + -5y + 7) = 0

Remove parenthesis around (-1 + -2y + 3y2)
-1 + -2y + 3y2 + (6y2 + -5y + 7) = 0

Reorder the terms:
-1 + -2y + 3y2 + (7 + -5y + 6y2) = 0

Remove parenthesis around (7 + -5y + 6y2)
-1 + -2y + 3y2 + 7 + -5y + 6y2 = 0

Reorder the terms:
-1 + 7 + -2y + -5y + 3y2 + 6y2 = 0

Combine like terms: -1 + 7 = 6
6 + -2y + -5y + 3y2 + 6y2 = 0

Combine like terms: -2y + -5y = -7y
6 + -7y + 3y2 + 6y2 = 0

Combine like terms: 3y2 + 6y2 = 9y2
6 + -7y + 9y2 = 0

Solving
6 + -7y + 9y2 = 0

Solving for variable 'y'.

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

Divide each side by '9'.
0.6666666667 + -0.7777777778y + y2 = 0

Move the constant term to the right:

Add '-0.6666666667' to each side of the equation.
0.6666666667 + -0.7777777778y + -0.6666666667 + y2 = 0 + -0.6666666667

Reorder the terms:
0.6666666667 + -0.6666666667 + -0.7777777778y + y2 = 0 + -0.6666666667

Combine like terms: 0.6666666667 + -0.6666666667 = 0.0000000000
0.0000000000 + -0.7777777778y + y2 = 0 + -0.6666666667
-0.7777777778y + y2 = 0 + -0.6666666667

Combine like terms: 0 + -0.6666666667 = -0.6666666667
-0.7777777778y + y2 = -0.6666666667

The y term is -0.7777777778y.  Take half its coefficient (-0.3888888889).
Square it (0.1512345679) and add it to both sides.

Add '0.1512345679' to each side of the equation.
-0.7777777778y + 0.1512345679 + y2 = -0.6666666667 + 0.1512345679

Reorder the terms:
0.1512345679 + -0.7777777778y + y2 = -0.6666666667 + 0.1512345679

Combine like terms: -0.6666666667 + 0.1512345679 = -0.5154320988
0.1512345679 + -0.7777777778y + y2 = -0.5154320988

Factor a perfect square on the left side:
(y + -0.3888888889)(y + -0.3888888889) = -0.5154320988

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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