2Y+9Y(Y-4)=52

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Solution for 2Y+9Y(Y-4)=52 equation:


Simplifying
2Y + 9Y(Y + -4) = 52

Reorder the terms:
2Y + 9Y(-4 + Y) = 52
2Y + (-4 * 9Y + Y * 9Y) = 52
2Y + (-36Y + 9Y2) = 52

Combine like terms: 2Y + -36Y = -34Y
-34Y + 9Y2 = 52

Solving
-34Y + 9Y2 = 52

Solving for variable 'Y'.

Reorder the terms:
-52 + -34Y + 9Y2 = 52 + -52

Combine like terms: 52 + -52 = 0
-52 + -34Y + 9Y2 = 0

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

Divide each side by '9'.
-5.777777778 + -3.777777778Y + Y2 = 0

Move the constant term to the right:

Add '5.777777778' to each side of the equation.
-5.777777778 + -3.777777778Y + 5.777777778 + Y2 = 0 + 5.777777778

Reorder the terms:
-5.777777778 + 5.777777778 + -3.777777778Y + Y2 = 0 + 5.777777778

Combine like terms: -5.777777778 + 5.777777778 = 0.000000000
0.000000000 + -3.777777778Y + Y2 = 0 + 5.777777778
-3.777777778Y + Y2 = 0 + 5.777777778

Combine like terms: 0 + 5.777777778 = 5.777777778
-3.777777778Y + Y2 = 5.777777778

The Y term is -3.777777778Y.  Take half its coefficient (-1.888888889).
Square it (3.567901235) and add it to both sides.

Add '3.567901235' to each side of the equation.
-3.777777778Y + 3.567901235 + Y2 = 5.777777778 + 3.567901235

Reorder the terms:
3.567901235 + -3.777777778Y + Y2 = 5.777777778 + 3.567901235

Combine like terms: 5.777777778 + 3.567901235 = 9.345679013
3.567901235 + -3.777777778Y + Y2 = 9.345679013

Factor a perfect square on the left side:
(Y + -1.888888889)(Y + -1.888888889) = 9.345679013

Calculate the square root of the right side: 3.057070332

Break this problem into two subproblems by setting 
(Y + -1.888888889) equal to 3.057070332 and -3.057070332.

Subproblem 1

Y + -1.888888889 = 3.057070332 Simplifying Y + -1.888888889 = 3.057070332 Reorder the terms: -1.888888889 + Y = 3.057070332 Solving -1.888888889 + Y = 3.057070332 Solving for variable 'Y'. Move all terms containing Y to the left, all other terms to the right. Add '1.888888889' to each side of the equation. -1.888888889 + 1.888888889 + Y = 3.057070332 + 1.888888889 Combine like terms: -1.888888889 + 1.888888889 = 0.000000000 0.000000000 + Y = 3.057070332 + 1.888888889 Y = 3.057070332 + 1.888888889 Combine like terms: 3.057070332 + 1.888888889 = 4.945959221 Y = 4.945959221 Simplifying Y = 4.945959221

Subproblem 2

Y + -1.888888889 = -3.057070332 Simplifying Y + -1.888888889 = -3.057070332 Reorder the terms: -1.888888889 + Y = -3.057070332 Solving -1.888888889 + Y = -3.057070332 Solving for variable 'Y'. Move all terms containing Y to the left, all other terms to the right. Add '1.888888889' to each side of the equation. -1.888888889 + 1.888888889 + Y = -3.057070332 + 1.888888889 Combine like terms: -1.888888889 + 1.888888889 = 0.000000000 0.000000000 + Y = -3.057070332 + 1.888888889 Y = -3.057070332 + 1.888888889 Combine like terms: -3.057070332 + 1.888888889 = -1.168181443 Y = -1.168181443 Simplifying Y = -1.168181443

Solution

The solution to the problem is based on the solutions from the subproblems. Y = {4.945959221, -1.168181443}

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