4y^2+11y+35+2y^2-2y-85=180

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Solution for 4y^2+11y+35+2y^2-2y-85=180 equation:


Simplifying
4y2 + 11y + 35 + 2y2 + -2y + -85 = 180

Reorder the terms:
35 + -85 + 11y + -2y + 4y2 + 2y2 = 180

Combine like terms: 35 + -85 = -50
-50 + 11y + -2y + 4y2 + 2y2 = 180

Combine like terms: 11y + -2y = 9y
-50 + 9y + 4y2 + 2y2 = 180

Combine like terms: 4y2 + 2y2 = 6y2
-50 + 9y + 6y2 = 180

Solving
-50 + 9y + 6y2 = 180

Solving for variable 'y'.

Reorder the terms:
-50 + -180 + 9y + 6y2 = 180 + -180

Combine like terms: -50 + -180 = -230
-230 + 9y + 6y2 = 180 + -180

Combine like terms: 180 + -180 = 0
-230 + 9y + 6y2 = 0

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

Divide each side by '6'.
-38.33333333 + 1.5y + y2 = 0

Move the constant term to the right:

Add '38.33333333' to each side of the equation.
-38.33333333 + 1.5y + 38.33333333 + y2 = 0 + 38.33333333

Reorder the terms:
-38.33333333 + 38.33333333 + 1.5y + y2 = 0 + 38.33333333

Combine like terms: -38.33333333 + 38.33333333 = 0.00000000
0.00000000 + 1.5y + y2 = 0 + 38.33333333
1.5y + y2 = 0 + 38.33333333

Combine like terms: 0 + 38.33333333 = 38.33333333
1.5y + y2 = 38.33333333

The y term is 1.5y.  Take half its coefficient (0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
1.5y + 0.5625 + y2 = 38.33333333 + 0.5625

Reorder the terms:
0.5625 + 1.5y + y2 = 38.33333333 + 0.5625

Combine like terms: 38.33333333 + 0.5625 = 38.89583333
0.5625 + 1.5y + y2 = 38.89583333

Factor a perfect square on the left side:
(y + 0.75)(y + 0.75) = 38.89583333

Calculate the square root of the right side: 6.236652414

Break this problem into two subproblems by setting 
(y + 0.75) equal to 6.236652414 and -6.236652414.

Subproblem 1

y + 0.75 = 6.236652414 Simplifying y + 0.75 = 6.236652414 Reorder the terms: 0.75 + y = 6.236652414 Solving 0.75 + y = 6.236652414 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + y = 6.236652414 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + y = 6.236652414 + -0.75 y = 6.236652414 + -0.75 Combine like terms: 6.236652414 + -0.75 = 5.486652414 y = 5.486652414 Simplifying y = 5.486652414

Subproblem 2

y + 0.75 = -6.236652414 Simplifying y + 0.75 = -6.236652414 Reorder the terms: 0.75 + y = -6.236652414 Solving 0.75 + y = -6.236652414 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + y = -6.236652414 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + y = -6.236652414 + -0.75 y = -6.236652414 + -0.75 Combine like terms: -6.236652414 + -0.75 = -6.986652414 y = -6.986652414 Simplifying y = -6.986652414

Solution

The solution to the problem is based on the solutions from the subproblems. y = {5.486652414, -6.986652414}

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