8y^2-37y-395=0

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Solution for 8y^2-37y-395=0 equation:


Simplifying
8y2 + -37y + -395 = 0

Reorder the terms:
-395 + -37y + 8y2 = 0

Solving
-395 + -37y + 8y2 = 0

Solving for variable 'y'.

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

Divide each side by '8'.
-49.375 + -4.625y + y2 = 0

Move the constant term to the right:

Add '49.375' to each side of the equation.
-49.375 + -4.625y + 49.375 + y2 = 0 + 49.375

Reorder the terms:
-49.375 + 49.375 + -4.625y + y2 = 0 + 49.375

Combine like terms: -49.375 + 49.375 = 0.000
0.000 + -4.625y + y2 = 0 + 49.375
-4.625y + y2 = 0 + 49.375

Combine like terms: 0 + 49.375 = 49.375
-4.625y + y2 = 49.375

The y term is -4.625y.  Take half its coefficient (-2.3125).
Square it (5.34765625) and add it to both sides.

Add '5.34765625' to each side of the equation.
-4.625y + 5.34765625 + y2 = 49.375 + 5.34765625

Reorder the terms:
5.34765625 + -4.625y + y2 = 49.375 + 5.34765625

Combine like terms: 49.375 + 5.34765625 = 54.72265625
5.34765625 + -4.625y + y2 = 54.72265625

Factor a perfect square on the left side:
(y + -2.3125)(y + -2.3125) = 54.72265625

Calculate the square root of the right side: 7.397476343

Break this problem into two subproblems by setting 
(y + -2.3125) equal to 7.397476343 and -7.397476343.

Subproblem 1

y + -2.3125 = 7.397476343 Simplifying y + -2.3125 = 7.397476343 Reorder the terms: -2.3125 + y = 7.397476343 Solving -2.3125 + y = 7.397476343 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '2.3125' to each side of the equation. -2.3125 + 2.3125 + y = 7.397476343 + 2.3125 Combine like terms: -2.3125 + 2.3125 = 0.0000 0.0000 + y = 7.397476343 + 2.3125 y = 7.397476343 + 2.3125 Combine like terms: 7.397476343 + 2.3125 = 9.709976343 y = 9.709976343 Simplifying y = 9.709976343

Subproblem 2

y + -2.3125 = -7.397476343 Simplifying y + -2.3125 = -7.397476343 Reorder the terms: -2.3125 + y = -7.397476343 Solving -2.3125 + y = -7.397476343 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '2.3125' to each side of the equation. -2.3125 + 2.3125 + y = -7.397476343 + 2.3125 Combine like terms: -2.3125 + 2.3125 = 0.0000 0.0000 + y = -7.397476343 + 2.3125 y = -7.397476343 + 2.3125 Combine like terms: -7.397476343 + 2.3125 = -5.084976343 y = -5.084976343 Simplifying y = -5.084976343

Solution

The solution to the problem is based on the solutions from the subproblems. y = {9.709976343, -5.084976343}

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