580=15y^2+1166y

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Solution for 580=15y^2+1166y equation:


Simplifying
580 = 15y2 + 1166y

Reorder the terms:
580 = 1166y + 15y2

Solving
580 = 1166y + 15y2

Solving for variable 'y'.

Reorder the terms:
580 + -1166y + -15y2 = 1166y + -1166y + 15y2 + -15y2

Combine like terms: 1166y + -1166y = 0
580 + -1166y + -15y2 = 0 + 15y2 + -15y2
580 + -1166y + -15y2 = 15y2 + -15y2

Combine like terms: 15y2 + -15y2 = 0
580 + -1166y + -15y2 = 0

Begin completing the square.  Divide all terms by
-15 the coefficient of the squared term: 

Divide each side by '-15'.
-38.66666667 + 77.73333333y + y2 = 0

Move the constant term to the right:

Add '38.66666667' to each side of the equation.
-38.66666667 + 77.73333333y + 38.66666667 + y2 = 0 + 38.66666667

Reorder the terms:
-38.66666667 + 38.66666667 + 77.73333333y + y2 = 0 + 38.66666667

Combine like terms: -38.66666667 + 38.66666667 = 0.00000000
0.00000000 + 77.73333333y + y2 = 0 + 38.66666667
77.73333333y + y2 = 0 + 38.66666667

Combine like terms: 0 + 38.66666667 = 38.66666667
77.73333333y + y2 = 38.66666667

The y term is 77.73333333y.  Take half its coefficient (38.86666667).
Square it (1510.617778) and add it to both sides.

Add '1510.617778' to each side of the equation.
77.73333333y + 1510.617778 + y2 = 38.66666667 + 1510.617778

Reorder the terms:
1510.617778 + 77.73333333y + y2 = 38.66666667 + 1510.617778

Combine like terms: 38.66666667 + 1510.617778 = 1549.28444467
1510.617778 + 77.73333333y + y2 = 1549.28444467

Factor a perfect square on the left side:
(y + 38.86666667)(y + 38.86666667) = 1549.28444467

Calculate the square root of the right side: 39.360950759

Break this problem into two subproblems by setting 
(y + 38.86666667) equal to 39.360950759 and -39.360950759.

Subproblem 1

y + 38.86666667 = 39.360950759 Simplifying y + 38.86666667 = 39.360950759 Reorder the terms: 38.86666667 + y = 39.360950759 Solving 38.86666667 + y = 39.360950759 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-38.86666667' to each side of the equation. 38.86666667 + -38.86666667 + y = 39.360950759 + -38.86666667 Combine like terms: 38.86666667 + -38.86666667 = 0.00000000 0.00000000 + y = 39.360950759 + -38.86666667 y = 39.360950759 + -38.86666667 Combine like terms: 39.360950759 + -38.86666667 = 0.494284089 y = 0.494284089 Simplifying y = 0.494284089

Subproblem 2

y + 38.86666667 = -39.360950759 Simplifying y + 38.86666667 = -39.360950759 Reorder the terms: 38.86666667 + y = -39.360950759 Solving 38.86666667 + y = -39.360950759 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-38.86666667' to each side of the equation. 38.86666667 + -38.86666667 + y = -39.360950759 + -38.86666667 Combine like terms: 38.86666667 + -38.86666667 = 0.00000000 0.00000000 + y = -39.360950759 + -38.86666667 y = -39.360950759 + -38.86666667 Combine like terms: -39.360950759 + -38.86666667 = -78.227617429 y = -78.227617429 Simplifying y = -78.227617429

Solution

The solution to the problem is based on the solutions from the subproblems. y = {0.494284089, -78.227617429}

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