((6y^2+2y-2)-(-y^2-10y+2))-(-4y^2+3y+3)=0

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Solution for ((6y^2+2y-2)-(-y^2-10y+2))-(-4y^2+3y+3)=0 equation:


Simplifying
((6y2 + 2y + -2) + -1(-1y2 + -10y + 2)) + -1(-4y2 + 3y + 3) = 0

Reorder the terms:
((-2 + 2y + 6y2) + -1(-1y2 + -10y + 2)) + -1(-4y2 + 3y + 3) = 0

Remove parenthesis around (-2 + 2y + 6y2)
(-2 + 2y + 6y2 + -1(-1y2 + -10y + 2)) + -1(-4y2 + 3y + 3) = 0

Reorder the terms:
(-2 + 2y + 6y2 + -1(2 + -10y + -1y2)) + -1(-4y2 + 3y + 3) = 0
(-2 + 2y + 6y2 + (2 * -1 + -10y * -1 + -1y2 * -1)) + -1(-4y2 + 3y + 3) = 0
(-2 + 2y + 6y2 + (-2 + 10y + 1y2)) + -1(-4y2 + 3y + 3) = 0

Reorder the terms:
(-2 + -2 + 2y + 10y + 6y2 + 1y2) + -1(-4y2 + 3y + 3) = 0

Combine like terms: -2 + -2 = -4
(-4 + 2y + 10y + 6y2 + 1y2) + -1(-4y2 + 3y + 3) = 0

Combine like terms: 2y + 10y = 12y
(-4 + 12y + 6y2 + 1y2) + -1(-4y2 + 3y + 3) = 0

Combine like terms: 6y2 + 1y2 = 7y2
(-4 + 12y + 7y2) + -1(-4y2 + 3y + 3) = 0

Remove parenthesis around (-4 + 12y + 7y2)
-4 + 12y + 7y2 + -1(-4y2 + 3y + 3) = 0

Reorder the terms:
-4 + 12y + 7y2 + -1(3 + 3y + -4y2) = 0
-4 + 12y + 7y2 + (3 * -1 + 3y * -1 + -4y2 * -1) = 0
-4 + 12y + 7y2 + (-3 + -3y + 4y2) = 0

Reorder the terms:
-4 + -3 + 12y + -3y + 7y2 + 4y2 = 0

Combine like terms: -4 + -3 = -7
-7 + 12y + -3y + 7y2 + 4y2 = 0

Combine like terms: 12y + -3y = 9y
-7 + 9y + 7y2 + 4y2 = 0

Combine like terms: 7y2 + 4y2 = 11y2
-7 + 9y + 11y2 = 0

Solving
-7 + 9y + 11y2 = 0

Solving for variable 'y'.

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

Divide each side by '11'.
-0.6363636364 + 0.8181818182y + y2 = 0

Move the constant term to the right:

Add '0.6363636364' to each side of the equation.
-0.6363636364 + 0.8181818182y + 0.6363636364 + y2 = 0 + 0.6363636364

Reorder the terms:
-0.6363636364 + 0.6363636364 + 0.8181818182y + y2 = 0 + 0.6363636364

Combine like terms: -0.6363636364 + 0.6363636364 = 0.0000000000
0.0000000000 + 0.8181818182y + y2 = 0 + 0.6363636364
0.8181818182y + y2 = 0 + 0.6363636364

Combine like terms: 0 + 0.6363636364 = 0.6363636364
0.8181818182y + y2 = 0.6363636364

The y term is 0.8181818182y.  Take half its coefficient (0.4090909091).
Square it (0.1673553719) and add it to both sides.

Add '0.1673553719' to each side of the equation.
0.8181818182y + 0.1673553719 + y2 = 0.6363636364 + 0.1673553719

Reorder the terms:
0.1673553719 + 0.8181818182y + y2 = 0.6363636364 + 0.1673553719

Combine like terms: 0.6363636364 + 0.1673553719 = 0.8037190083
0.1673553719 + 0.8181818182y + y2 = 0.8037190083

Factor a perfect square on the left side:
(y + 0.4090909091)(y + 0.4090909091) = 0.8037190083

Calculate the square root of the right side: 0.896503769

Break this problem into two subproblems by setting 
(y + 0.4090909091) equal to 0.896503769 and -0.896503769.

Subproblem 1

y + 0.4090909091 = 0.896503769 Simplifying y + 0.4090909091 = 0.896503769 Reorder the terms: 0.4090909091 + y = 0.896503769 Solving 0.4090909091 + y = 0.896503769 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.4090909091' to each side of the equation. 0.4090909091 + -0.4090909091 + y = 0.896503769 + -0.4090909091 Combine like terms: 0.4090909091 + -0.4090909091 = 0.0000000000 0.0000000000 + y = 0.896503769 + -0.4090909091 y = 0.896503769 + -0.4090909091 Combine like terms: 0.896503769 + -0.4090909091 = 0.4874128599 y = 0.4874128599 Simplifying y = 0.4874128599

Subproblem 2

y + 0.4090909091 = -0.896503769 Simplifying y + 0.4090909091 = -0.896503769 Reorder the terms: 0.4090909091 + y = -0.896503769 Solving 0.4090909091 + y = -0.896503769 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.4090909091' to each side of the equation. 0.4090909091 + -0.4090909091 + y = -0.896503769 + -0.4090909091 Combine like terms: 0.4090909091 + -0.4090909091 = 0.0000000000 0.0000000000 + y = -0.896503769 + -0.4090909091 y = -0.896503769 + -0.4090909091 Combine like terms: -0.896503769 + -0.4090909091 = -1.3055946781 y = -1.3055946781 Simplifying y = -1.3055946781

Solution

The solution to the problem is based on the solutions from the subproblems. y = {0.4874128599, -1.3055946781}

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