13y^2+14y-1=

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Solution for 13y^2+14y-1= equation:


Simplifying
13y2 + 14y + -1 = 0

Reorder the terms:
-1 + 14y + 13y2 = 0

Solving
-1 + 14y + 13y2 = 0

Solving for variable 'y'.

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

Divide each side by '13'.
-0.07692307692 + 1.076923077y + y2 = 0

Move the constant term to the right:

Add '0.07692307692' to each side of the equation.
-0.07692307692 + 1.076923077y + 0.07692307692 + y2 = 0 + 0.07692307692

Reorder the terms:
-0.07692307692 + 0.07692307692 + 1.076923077y + y2 = 0 + 0.07692307692

Combine like terms: -0.07692307692 + 0.07692307692 = 0.00000000000
0.00000000000 + 1.076923077y + y2 = 0 + 0.07692307692
1.076923077y + y2 = 0 + 0.07692307692

Combine like terms: 0 + 0.07692307692 = 0.07692307692
1.076923077y + y2 = 0.07692307692

The y term is 1.076923077y.  Take half its coefficient (0.5384615385).
Square it (0.2899408284) and add it to both sides.

Add '0.2899408284' to each side of the equation.
1.076923077y + 0.2899408284 + y2 = 0.07692307692 + 0.2899408284

Reorder the terms:
0.2899408284 + 1.076923077y + y2 = 0.07692307692 + 0.2899408284

Combine like terms: 0.07692307692 + 0.2899408284 = 0.36686390532
0.2899408284 + 1.076923077y + y2 = 0.36686390532

Factor a perfect square on the left side:
(y + 0.5384615385)(y + 0.5384615385) = 0.36686390532

Calculate the square root of the right side: 0.605692913

Break this problem into two subproblems by setting 
(y + 0.5384615385) equal to 0.605692913 and -0.605692913.

Subproblem 1

y + 0.5384615385 = 0.605692913 Simplifying y + 0.5384615385 = 0.605692913 Reorder the terms: 0.5384615385 + y = 0.605692913 Solving 0.5384615385 + y = 0.605692913 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.5384615385' to each side of the equation. 0.5384615385 + -0.5384615385 + y = 0.605692913 + -0.5384615385 Combine like terms: 0.5384615385 + -0.5384615385 = 0.0000000000 0.0000000000 + y = 0.605692913 + -0.5384615385 y = 0.605692913 + -0.5384615385 Combine like terms: 0.605692913 + -0.5384615385 = 0.0672313745 y = 0.0672313745 Simplifying y = 0.0672313745

Subproblem 2

y + 0.5384615385 = -0.605692913 Simplifying y + 0.5384615385 = -0.605692913 Reorder the terms: 0.5384615385 + y = -0.605692913 Solving 0.5384615385 + y = -0.605692913 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.5384615385' to each side of the equation. 0.5384615385 + -0.5384615385 + y = -0.605692913 + -0.5384615385 Combine like terms: 0.5384615385 + -0.5384615385 = 0.0000000000 0.0000000000 + y = -0.605692913 + -0.5384615385 y = -0.605692913 + -0.5384615385 Combine like terms: -0.605692913 + -0.5384615385 = -1.1441544515 y = -1.1441544515 Simplifying y = -1.1441544515

Solution

The solution to the problem is based on the solutions from the subproblems. y = {0.0672313745, -1.1441544515}

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