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

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


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

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

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

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

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

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

Combine like terms: -5 + -3 = -8
-8 + -5 + -6y + -5y + 6y2 + -2y2 = 0

Combine like terms: -8 + -5 = -13
-13 + -6y + -5y + 6y2 + -2y2 = 0

Combine like terms: -6y + -5y = -11y
-13 + -11y + 6y2 + -2y2 = 0

Combine like terms: 6y2 + -2y2 = 4y2
-13 + -11y + 4y2 = 0

Solving
-13 + -11y + 4y2 = 0

Solving for variable 'y'.

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

Divide each side by '4'.
-3.25 + -2.75y + y2 = 0

Move the constant term to the right:

Add '3.25' to each side of the equation.
-3.25 + -2.75y + 3.25 + y2 = 0 + 3.25

Reorder the terms:
-3.25 + 3.25 + -2.75y + y2 = 0 + 3.25

Combine like terms: -3.25 + 3.25 = 0.00
0.00 + -2.75y + y2 = 0 + 3.25
-2.75y + y2 = 0 + 3.25

Combine like terms: 0 + 3.25 = 3.25
-2.75y + y2 = 3.25

The y term is -2.75y.  Take half its coefficient (-1.375).
Square it (1.890625) and add it to both sides.

Add '1.890625' to each side of the equation.
-2.75y + 1.890625 + y2 = 3.25 + 1.890625

Reorder the terms:
1.890625 + -2.75y + y2 = 3.25 + 1.890625

Combine like terms: 3.25 + 1.890625 = 5.140625
1.890625 + -2.75y + y2 = 5.140625

Factor a perfect square on the left side:
(y + -1.375)(y + -1.375) = 5.140625

Calculate the square root of the right side: 2.267294643

Break this problem into two subproblems by setting 
(y + -1.375) equal to 2.267294643 and -2.267294643.

Subproblem 1

y + -1.375 = 2.267294643 Simplifying y + -1.375 = 2.267294643 Reorder the terms: -1.375 + y = 2.267294643 Solving -1.375 + y = 2.267294643 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.375' to each side of the equation. -1.375 + 1.375 + y = 2.267294643 + 1.375 Combine like terms: -1.375 + 1.375 = 0.000 0.000 + y = 2.267294643 + 1.375 y = 2.267294643 + 1.375 Combine like terms: 2.267294643 + 1.375 = 3.642294643 y = 3.642294643 Simplifying y = 3.642294643

Subproblem 2

y + -1.375 = -2.267294643 Simplifying y + -1.375 = -2.267294643 Reorder the terms: -1.375 + y = -2.267294643 Solving -1.375 + y = -2.267294643 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.375' to each side of the equation. -1.375 + 1.375 + y = -2.267294643 + 1.375 Combine like terms: -1.375 + 1.375 = 0.000 0.000 + y = -2.267294643 + 1.375 y = -2.267294643 + 1.375 Combine like terms: -2.267294643 + 1.375 = -0.892294643 y = -0.892294643 Simplifying y = -0.892294643

Solution

The solution to the problem is based on the solutions from the subproblems. y = {3.642294643, -0.892294643}

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