4y^2-13y-10=0

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Solution for 4y^2-13y-10=0 equation:


Simplifying
4y2 + -13y + -10 = 0

Reorder the terms:
-10 + -13y + 4y2 = 0

Solving
-10 + -13y + 4y2 = 0

Solving for variable 'y'.

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

Divide each side by '4'.
-2.5 + -3.25y + y2 = 0

Move the constant term to the right:

Add '2.5' to each side of the equation.
-2.5 + -3.25y + 2.5 + y2 = 0 + 2.5

Reorder the terms:
-2.5 + 2.5 + -3.25y + y2 = 0 + 2.5

Combine like terms: -2.5 + 2.5 = 0.0
0.0 + -3.25y + y2 = 0 + 2.5
-3.25y + y2 = 0 + 2.5

Combine like terms: 0 + 2.5 = 2.5
-3.25y + y2 = 2.5

The y term is -3.25y.  Take half its coefficient (-1.625).
Square it (2.640625) and add it to both sides.

Add '2.640625' to each side of the equation.
-3.25y + 2.640625 + y2 = 2.5 + 2.640625

Reorder the terms:
2.640625 + -3.25y + y2 = 2.5 + 2.640625

Combine like terms: 2.5 + 2.640625 = 5.140625
2.640625 + -3.25y + y2 = 5.140625

Factor a perfect square on the left side:
(y + -1.625)(y + -1.625) = 5.140625

Calculate the square root of the right side: 2.267294643

Break this problem into two subproblems by setting 
(y + -1.625) equal to 2.267294643 and -2.267294643.

Subproblem 1

y + -1.625 = 2.267294643 Simplifying y + -1.625 = 2.267294643 Reorder the terms: -1.625 + y = 2.267294643 Solving -1.625 + y = 2.267294643 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.625' to each side of the equation. -1.625 + 1.625 + y = 2.267294643 + 1.625 Combine like terms: -1.625 + 1.625 = 0.000 0.000 + y = 2.267294643 + 1.625 y = 2.267294643 + 1.625 Combine like terms: 2.267294643 + 1.625 = 3.892294643 y = 3.892294643 Simplifying y = 3.892294643

Subproblem 2

y + -1.625 = -2.267294643 Simplifying y + -1.625 = -2.267294643 Reorder the terms: -1.625 + y = -2.267294643 Solving -1.625 + y = -2.267294643 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.625' to each side of the equation. -1.625 + 1.625 + y = -2.267294643 + 1.625 Combine like terms: -1.625 + 1.625 = 0.000 0.000 + y = -2.267294643 + 1.625 y = -2.267294643 + 1.625 Combine like terms: -2.267294643 + 1.625 = -0.642294643 y = -0.642294643 Simplifying y = -0.642294643

Solution

The solution to the problem is based on the solutions from the subproblems. y = {3.892294643, -0.642294643}

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