12y(y+5)=13y+2

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Solution for 12y(y+5)=13y+2 equation:


Simplifying
12y(y + 5) = 13y + 2

Reorder the terms:
12y(5 + y) = 13y + 2
(5 * 12y + y * 12y) = 13y + 2
(60y + 12y2) = 13y + 2

Reorder the terms:
60y + 12y2 = 2 + 13y

Solving
60y + 12y2 = 2 + 13y

Solving for variable 'y'.

Reorder the terms:
-2 + 60y + -13y + 12y2 = 2 + 13y + -2 + -13y

Combine like terms: 60y + -13y = 47y
-2 + 47y + 12y2 = 2 + 13y + -2 + -13y

Reorder the terms:
-2 + 47y + 12y2 = 2 + -2 + 13y + -13y

Combine like terms: 2 + -2 = 0
-2 + 47y + 12y2 = 0 + 13y + -13y
-2 + 47y + 12y2 = 13y + -13y

Combine like terms: 13y + -13y = 0
-2 + 47y + 12y2 = 0

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

Divide each side by '12'.
-0.1666666667 + 3.916666667y + y2 = 0

Move the constant term to the right:

Add '0.1666666667' to each side of the equation.
-0.1666666667 + 3.916666667y + 0.1666666667 + y2 = 0 + 0.1666666667

Reorder the terms:
-0.1666666667 + 0.1666666667 + 3.916666667y + y2 = 0 + 0.1666666667

Combine like terms: -0.1666666667 + 0.1666666667 = 0.0000000000
0.0000000000 + 3.916666667y + y2 = 0 + 0.1666666667
3.916666667y + y2 = 0 + 0.1666666667

Combine like terms: 0 + 0.1666666667 = 0.1666666667
3.916666667y + y2 = 0.1666666667

The y term is 3.916666667y.  Take half its coefficient (1.958333334).
Square it (3.835069447) and add it to both sides.

Add '3.835069447' to each side of the equation.
3.916666667y + 3.835069447 + y2 = 0.1666666667 + 3.835069447

Reorder the terms:
3.835069447 + 3.916666667y + y2 = 0.1666666667 + 3.835069447

Combine like terms: 0.1666666667 + 3.835069447 = 4.0017361137
3.835069447 + 3.916666667y + y2 = 4.0017361137

Factor a perfect square on the left side:
(y + 1.958333334)(y + 1.958333334) = 4.0017361137

Calculate the square root of the right side: 2.000433981

Break this problem into two subproblems by setting 
(y + 1.958333334) equal to 2.000433981 and -2.000433981.

Subproblem 1

y + 1.958333334 = 2.000433981 Simplifying y + 1.958333334 = 2.000433981 Reorder the terms: 1.958333334 + y = 2.000433981 Solving 1.958333334 + y = 2.000433981 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-1.958333334' to each side of the equation. 1.958333334 + -1.958333334 + y = 2.000433981 + -1.958333334 Combine like terms: 1.958333334 + -1.958333334 = 0.000000000 0.000000000 + y = 2.000433981 + -1.958333334 y = 2.000433981 + -1.958333334 Combine like terms: 2.000433981 + -1.958333334 = 0.042100647 y = 0.042100647 Simplifying y = 0.042100647

Subproblem 2

y + 1.958333334 = -2.000433981 Simplifying y + 1.958333334 = -2.000433981 Reorder the terms: 1.958333334 + y = -2.000433981 Solving 1.958333334 + y = -2.000433981 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-1.958333334' to each side of the equation. 1.958333334 + -1.958333334 + y = -2.000433981 + -1.958333334 Combine like terms: 1.958333334 + -1.958333334 = 0.000000000 0.000000000 + y = -2.000433981 + -1.958333334 y = -2.000433981 + -1.958333334 Combine like terms: -2.000433981 + -1.958333334 = -3.958767315 y = -3.958767315 Simplifying y = -3.958767315

Solution

The solution to the problem is based on the solutions from the subproblems. y = {0.042100647, -3.958767315}

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