9y^2+70y-833=0

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Solution for 9y^2+70y-833=0 equation:


Simplifying
9y2 + 70y + -833 = 0

Reorder the terms:
-833 + 70y + 9y2 = 0

Solving
-833 + 70y + 9y2 = 0

Solving for variable 'y'.

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

Divide each side by '9'.
-92.55555556 + 7.777777778y + y2 = 0

Move the constant term to the right:

Add '92.55555556' to each side of the equation.
-92.55555556 + 7.777777778y + 92.55555556 + y2 = 0 + 92.55555556

Reorder the terms:
-92.55555556 + 92.55555556 + 7.777777778y + y2 = 0 + 92.55555556

Combine like terms: -92.55555556 + 92.55555556 = 0.00000000
0.00000000 + 7.777777778y + y2 = 0 + 92.55555556
7.777777778y + y2 = 0 + 92.55555556

Combine like terms: 0 + 92.55555556 = 92.55555556
7.777777778y + y2 = 92.55555556

The y term is 7.777777778y.  Take half its coefficient (3.888888889).
Square it (15.12345679) and add it to both sides.

Add '15.12345679' to each side of the equation.
7.777777778y + 15.12345679 + y2 = 92.55555556 + 15.12345679

Reorder the terms:
15.12345679 + 7.777777778y + y2 = 92.55555556 + 15.12345679

Combine like terms: 92.55555556 + 15.12345679 = 107.67901235
15.12345679 + 7.777777778y + y2 = 107.67901235

Factor a perfect square on the left side:
(y + 3.888888889)(y + 3.888888889) = 107.67901235

Calculate the square root of the right side: 10.376849828

Break this problem into two subproblems by setting 
(y + 3.888888889) equal to 10.376849828 and -10.376849828.

Subproblem 1

y + 3.888888889 = 10.376849828 Simplifying y + 3.888888889 = 10.376849828 Reorder the terms: 3.888888889 + y = 10.376849828 Solving 3.888888889 + y = 10.376849828 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-3.888888889' to each side of the equation. 3.888888889 + -3.888888889 + y = 10.376849828 + -3.888888889 Combine like terms: 3.888888889 + -3.888888889 = 0.000000000 0.000000000 + y = 10.376849828 + -3.888888889 y = 10.376849828 + -3.888888889 Combine like terms: 10.376849828 + -3.888888889 = 6.487960939 y = 6.487960939 Simplifying y = 6.487960939

Subproblem 2

y + 3.888888889 = -10.376849828 Simplifying y + 3.888888889 = -10.376849828 Reorder the terms: 3.888888889 + y = -10.376849828 Solving 3.888888889 + y = -10.376849828 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-3.888888889' to each side of the equation. 3.888888889 + -3.888888889 + y = -10.376849828 + -3.888888889 Combine like terms: 3.888888889 + -3.888888889 = 0.000000000 0.000000000 + y = -10.376849828 + -3.888888889 y = -10.376849828 + -3.888888889 Combine like terms: -10.376849828 + -3.888888889 = -14.265738717 y = -14.265738717 Simplifying y = -14.265738717

Solution

The solution to the problem is based on the solutions from the subproblems. y = {6.487960939, -14.265738717}

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