-10y^2+35y+57=0

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Solution for -10y^2+35y+57=0 equation:


Simplifying
-10y2 + 35y + 57 = 0

Reorder the terms:
57 + 35y + -10y2 = 0

Solving
57 + 35y + -10y2 = 0

Solving for variable 'y'.

Begin completing the square.  Divide all terms by
-10 the coefficient of the squared term: 

Divide each side by '-10'.
-5.7 + -3.5y + y2 = 0

Move the constant term to the right:

Add '5.7' to each side of the equation.
-5.7 + -3.5y + 5.7 + y2 = 0 + 5.7

Reorder the terms:
-5.7 + 5.7 + -3.5y + y2 = 0 + 5.7

Combine like terms: -5.7 + 5.7 = 0.0
0.0 + -3.5y + y2 = 0 + 5.7
-3.5y + y2 = 0 + 5.7

Combine like terms: 0 + 5.7 = 5.7
-3.5y + y2 = 5.7

The y term is -3.5y.  Take half its coefficient (-1.75).
Square it (3.0625) and add it to both sides.

Add '3.0625' to each side of the equation.
-3.5y + 3.0625 + y2 = 5.7 + 3.0625

Reorder the terms:
3.0625 + -3.5y + y2 = 5.7 + 3.0625

Combine like terms: 5.7 + 3.0625 = 8.7625
3.0625 + -3.5y + y2 = 8.7625

Factor a perfect square on the left side:
(y + -1.75)(y + -1.75) = 8.7625

Calculate the square root of the right side: 2.960152023

Break this problem into two subproblems by setting 
(y + -1.75) equal to 2.960152023 and -2.960152023.

Subproblem 1

y + -1.75 = 2.960152023 Simplifying y + -1.75 = 2.960152023 Reorder the terms: -1.75 + y = 2.960152023 Solving -1.75 + y = 2.960152023 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.75' to each side of the equation. -1.75 + 1.75 + y = 2.960152023 + 1.75 Combine like terms: -1.75 + 1.75 = 0.00 0.00 + y = 2.960152023 + 1.75 y = 2.960152023 + 1.75 Combine like terms: 2.960152023 + 1.75 = 4.710152023 y = 4.710152023 Simplifying y = 4.710152023

Subproblem 2

y + -1.75 = -2.960152023 Simplifying y + -1.75 = -2.960152023 Reorder the terms: -1.75 + y = -2.960152023 Solving -1.75 + y = -2.960152023 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.75' to each side of the equation. -1.75 + 1.75 + y = -2.960152023 + 1.75 Combine like terms: -1.75 + 1.75 = 0.00 0.00 + y = -2.960152023 + 1.75 y = -2.960152023 + 1.75 Combine like terms: -2.960152023 + 1.75 = -1.210152023 y = -1.210152023 Simplifying y = -1.210152023

Solution

The solution to the problem is based on the solutions from the subproblems. y = {4.710152023, -1.210152023}

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