-5y^2-26y+160=0

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Solution for -5y^2-26y+160=0 equation:


Simplifying
-5y2 + -26y + 160 = 0

Reorder the terms:
160 + -26y + -5y2 = 0

Solving
160 + -26y + -5y2 = 0

Solving for variable 'y'.

Begin completing the square.  Divide all terms by
-5 the coefficient of the squared term: 

Divide each side by '-5'.
-32 + 5.2y + y2 = 0

Move the constant term to the right:

Add '32' to each side of the equation.
-32 + 5.2y + 32 + y2 = 0 + 32

Reorder the terms:
-32 + 32 + 5.2y + y2 = 0 + 32

Combine like terms: -32 + 32 = 0
0 + 5.2y + y2 = 0 + 32
5.2y + y2 = 0 + 32

Combine like terms: 0 + 32 = 32
5.2y + y2 = 32

The y term is 5.2y.  Take half its coefficient (2.6).
Square it (6.76) and add it to both sides.

Add '6.76' to each side of the equation.
5.2y + 6.76 + y2 = 32 + 6.76

Reorder the terms:
6.76 + 5.2y + y2 = 32 + 6.76

Combine like terms: 32 + 6.76 = 38.76
6.76 + 5.2y + y2 = 38.76

Factor a perfect square on the left side:
(y + 2.6)(y + 2.6) = 38.76

Calculate the square root of the right side: 6.225752967

Break this problem into two subproblems by setting 
(y + 2.6) equal to 6.225752967 and -6.225752967.

Subproblem 1

y + 2.6 = 6.225752967 Simplifying y + 2.6 = 6.225752967 Reorder the terms: 2.6 + y = 6.225752967 Solving 2.6 + y = 6.225752967 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-2.6' to each side of the equation. 2.6 + -2.6 + y = 6.225752967 + -2.6 Combine like terms: 2.6 + -2.6 = 0.0 0.0 + y = 6.225752967 + -2.6 y = 6.225752967 + -2.6 Combine like terms: 6.225752967 + -2.6 = 3.625752967 y = 3.625752967 Simplifying y = 3.625752967

Subproblem 2

y + 2.6 = -6.225752967 Simplifying y + 2.6 = -6.225752967 Reorder the terms: 2.6 + y = -6.225752967 Solving 2.6 + y = -6.225752967 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-2.6' to each side of the equation. 2.6 + -2.6 + y = -6.225752967 + -2.6 Combine like terms: 2.6 + -2.6 = 0.0 0.0 + y = -6.225752967 + -2.6 y = -6.225752967 + -2.6 Combine like terms: -6.225752967 + -2.6 = -8.825752967 y = -8.825752967 Simplifying y = -8.825752967

Solution

The solution to the problem is based on the solutions from the subproblems. y = {3.625752967, -8.825752967}

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