(3y+4)(-2y+6)+(3y+6)=

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


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

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

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

Multiply (4 + 3y) * (6 + -2y)
(4(6 + -2y) + 3y * (6 + -2y)) + (3y + 6) = 0
((6 * 4 + -2y * 4) + 3y * (6 + -2y)) + (3y + 6) = 0
((24 + -8y) + 3y * (6 + -2y)) + (3y + 6) = 0
(24 + -8y + (6 * 3y + -2y * 3y)) + (3y + 6) = 0
(24 + -8y + (18y + -6y2)) + (3y + 6) = 0

Combine like terms: -8y + 18y = 10y
(24 + 10y + -6y2) + (3y + 6) = 0

Reorder the terms:
24 + 10y + -6y2 + (6 + 3y) = 0

Remove parenthesis around (6 + 3y)
24 + 10y + -6y2 + 6 + 3y = 0

Reorder the terms:
24 + 6 + 10y + 3y + -6y2 = 0

Combine like terms: 24 + 6 = 30
30 + 10y + 3y + -6y2 = 0

Combine like terms: 10y + 3y = 13y
30 + 13y + -6y2 = 0

Solving
30 + 13y + -6y2 = 0

Solving for variable 'y'.

Begin completing the square.  Divide all terms by
-6 the coefficient of the squared term: 

Divide each side by '-6'.
-5 + -2.166666667y + y2 = 0

Move the constant term to the right:

Add '5' to each side of the equation.
-5 + -2.166666667y + 5 + y2 = 0 + 5

Reorder the terms:
-5 + 5 + -2.166666667y + y2 = 0 + 5

Combine like terms: -5 + 5 = 0
0 + -2.166666667y + y2 = 0 + 5
-2.166666667y + y2 = 0 + 5

Combine like terms: 0 + 5 = 5
-2.166666667y + y2 = 5

The y term is -2.166666667y.  Take half its coefficient (-1.083333334).
Square it (1.173611113) and add it to both sides.

Add '1.173611113' to each side of the equation.
-2.166666667y + 1.173611113 + y2 = 5 + 1.173611113

Reorder the terms:
1.173611113 + -2.166666667y + y2 = 5 + 1.173611113

Combine like terms: 5 + 1.173611113 = 6.173611113
1.173611113 + -2.166666667y + y2 = 6.173611113

Factor a perfect square on the left side:
(y + -1.083333334)(y + -1.083333334) = 6.173611113

Calculate the square root of the right side: 2.484675253

Break this problem into two subproblems by setting 
(y + -1.083333334) equal to 2.484675253 and -2.484675253.

Subproblem 1

y + -1.083333334 = 2.484675253 Simplifying y + -1.083333334 = 2.484675253 Reorder the terms: -1.083333334 + y = 2.484675253 Solving -1.083333334 + y = 2.484675253 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.083333334' to each side of the equation. -1.083333334 + 1.083333334 + y = 2.484675253 + 1.083333334 Combine like terms: -1.083333334 + 1.083333334 = 0.000000000 0.000000000 + y = 2.484675253 + 1.083333334 y = 2.484675253 + 1.083333334 Combine like terms: 2.484675253 + 1.083333334 = 3.568008587 y = 3.568008587 Simplifying y = 3.568008587

Subproblem 2

y + -1.083333334 = -2.484675253 Simplifying y + -1.083333334 = -2.484675253 Reorder the terms: -1.083333334 + y = -2.484675253 Solving -1.083333334 + y = -2.484675253 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.083333334' to each side of the equation. -1.083333334 + 1.083333334 + y = -2.484675253 + 1.083333334 Combine like terms: -1.083333334 + 1.083333334 = 0.000000000 0.000000000 + y = -2.484675253 + 1.083333334 y = -2.484675253 + 1.083333334 Combine like terms: -2.484675253 + 1.083333334 = -1.401341919 y = -1.401341919 Simplifying y = -1.401341919

Solution

The solution to the problem is based on the solutions from the subproblems. y = {3.568008587, -1.401341919}

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