29y^2+3y-72=0

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Solution for 29y^2+3y-72=0 equation:


Simplifying
29y2 + 3y + -72 = 0

Reorder the terms:
-72 + 3y + 29y2 = 0

Solving
-72 + 3y + 29y2 = 0

Solving for variable 'y'.

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

Divide each side by '29'.
-2.482758621 + 0.1034482759y + y2 = 0

Move the constant term to the right:

Add '2.482758621' to each side of the equation.
-2.482758621 + 0.1034482759y + 2.482758621 + y2 = 0 + 2.482758621

Reorder the terms:
-2.482758621 + 2.482758621 + 0.1034482759y + y2 = 0 + 2.482758621

Combine like terms: -2.482758621 + 2.482758621 = 0.000000000
0.000000000 + 0.1034482759y + y2 = 0 + 2.482758621
0.1034482759y + y2 = 0 + 2.482758621

Combine like terms: 0 + 2.482758621 = 2.482758621
0.1034482759y + y2 = 2.482758621

The y term is 0.1034482759y.  Take half its coefficient (0.05172413795).
Square it (0.002675386447) and add it to both sides.

Add '0.002675386447' to each side of the equation.
0.1034482759y + 0.002675386447 + y2 = 2.482758621 + 0.002675386447

Reorder the terms:
0.002675386447 + 0.1034482759y + y2 = 2.482758621 + 0.002675386447

Combine like terms: 2.482758621 + 0.002675386447 = 2.485434007447
0.002675386447 + 0.1034482759y + y2 = 2.485434007447

Factor a perfect square on the left side:
(y + 0.05172413795)(y + 0.05172413795) = 2.485434007447

Calculate the square root of the right side: 1.57652593

Break this problem into two subproblems by setting 
(y + 0.05172413795) equal to 1.57652593 and -1.57652593.

Subproblem 1

y + 0.05172413795 = 1.57652593 Simplifying y + 0.05172413795 = 1.57652593 Reorder the terms: 0.05172413795 + y = 1.57652593 Solving 0.05172413795 + y = 1.57652593 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.05172413795' to each side of the equation. 0.05172413795 + -0.05172413795 + y = 1.57652593 + -0.05172413795 Combine like terms: 0.05172413795 + -0.05172413795 = 0.00000000000 0.00000000000 + y = 1.57652593 + -0.05172413795 y = 1.57652593 + -0.05172413795 Combine like terms: 1.57652593 + -0.05172413795 = 1.52480179205 y = 1.52480179205 Simplifying y = 1.52480179205

Subproblem 2

y + 0.05172413795 = -1.57652593 Simplifying y + 0.05172413795 = -1.57652593 Reorder the terms: 0.05172413795 + y = -1.57652593 Solving 0.05172413795 + y = -1.57652593 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.05172413795' to each side of the equation. 0.05172413795 + -0.05172413795 + y = -1.57652593 + -0.05172413795 Combine like terms: 0.05172413795 + -0.05172413795 = 0.00000000000 0.00000000000 + y = -1.57652593 + -0.05172413795 y = -1.57652593 + -0.05172413795 Combine like terms: -1.57652593 + -0.05172413795 = -1.62825006795 y = -1.62825006795 Simplifying y = -1.62825006795

Solution

The solution to the problem is based on the solutions from the subproblems. y = {1.52480179205, -1.62825006795}

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