5y^2+2y-34=0

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Solution for 5y^2+2y-34=0 equation:


Simplifying
5y2 + 2y + -34 = 0

Reorder the terms:
-34 + 2y + 5y2 = 0

Solving
-34 + 2y + 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'.
-6.8 + 0.4y + y2 = 0

Move the constant term to the right:

Add '6.8' to each side of the equation.
-6.8 + 0.4y + 6.8 + y2 = 0 + 6.8

Reorder the terms:
-6.8 + 6.8 + 0.4y + y2 = 0 + 6.8

Combine like terms: -6.8 + 6.8 = 0.0
0.0 + 0.4y + y2 = 0 + 6.8
0.4y + y2 = 0 + 6.8

Combine like terms: 0 + 6.8 = 6.8
0.4y + y2 = 6.8

The y term is 0.4y.  Take half its coefficient (0.2).
Square it (0.04) and add it to both sides.

Add '0.04' to each side of the equation.
0.4y + 0.04 + y2 = 6.8 + 0.04

Reorder the terms:
0.04 + 0.4y + y2 = 6.8 + 0.04

Combine like terms: 6.8 + 0.04 = 6.84
0.04 + 0.4y + y2 = 6.84

Factor a perfect square on the left side:
(y + 0.2)(y + 0.2) = 6.84

Calculate the square root of the right side: 2.615339366

Break this problem into two subproblems by setting 
(y + 0.2) equal to 2.615339366 and -2.615339366.

Subproblem 1

y + 0.2 = 2.615339366 Simplifying y + 0.2 = 2.615339366 Reorder the terms: 0.2 + y = 2.615339366 Solving 0.2 + y = 2.615339366 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.2' to each side of the equation. 0.2 + -0.2 + y = 2.615339366 + -0.2 Combine like terms: 0.2 + -0.2 = 0.0 0.0 + y = 2.615339366 + -0.2 y = 2.615339366 + -0.2 Combine like terms: 2.615339366 + -0.2 = 2.415339366 y = 2.415339366 Simplifying y = 2.415339366

Subproblem 2

y + 0.2 = -2.615339366 Simplifying y + 0.2 = -2.615339366 Reorder the terms: 0.2 + y = -2.615339366 Solving 0.2 + y = -2.615339366 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.2' to each side of the equation. 0.2 + -0.2 + y = -2.615339366 + -0.2 Combine like terms: 0.2 + -0.2 = 0.0 0.0 + y = -2.615339366 + -0.2 y = -2.615339366 + -0.2 Combine like terms: -2.615339366 + -0.2 = -2.815339366 y = -2.815339366 Simplifying y = -2.815339366

Solution

The solution to the problem is based on the solutions from the subproblems. y = {2.415339366, -2.815339366}

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