14y^2+58y+15=0

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Solution for 14y^2+58y+15=0 equation:


Simplifying
14y2 + 58y + 15 = 0

Reorder the terms:
15 + 58y + 14y2 = 0

Solving
15 + 58y + 14y2 = 0

Solving for variable 'y'.

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

Divide each side by '14'.
1.071428571 + 4.142857143y + y2 = 0

Move the constant term to the right:

Add '-1.071428571' to each side of the equation.
1.071428571 + 4.142857143y + -1.071428571 + y2 = 0 + -1.071428571

Reorder the terms:
1.071428571 + -1.071428571 + 4.142857143y + y2 = 0 + -1.071428571

Combine like terms: 1.071428571 + -1.071428571 = 0.000000000
0.000000000 + 4.142857143y + y2 = 0 + -1.071428571
4.142857143y + y2 = 0 + -1.071428571

Combine like terms: 0 + -1.071428571 = -1.071428571
4.142857143y + y2 = -1.071428571

The y term is 4.142857143y.  Take half its coefficient (2.071428572).
Square it (4.290816329) and add it to both sides.

Add '4.290816329' to each side of the equation.
4.142857143y + 4.290816329 + y2 = -1.071428571 + 4.290816329

Reorder the terms:
4.290816329 + 4.142857143y + y2 = -1.071428571 + 4.290816329

Combine like terms: -1.071428571 + 4.290816329 = 3.219387758
4.290816329 + 4.142857143y + y2 = 3.219387758

Factor a perfect square on the left side:
(y + 2.071428572)(y + 2.071428572) = 3.219387758

Calculate the square root of the right side: 1.794265242

Break this problem into two subproblems by setting 
(y + 2.071428572) equal to 1.794265242 and -1.794265242.

Subproblem 1

y + 2.071428572 = 1.794265242 Simplifying y + 2.071428572 = 1.794265242 Reorder the terms: 2.071428572 + y = 1.794265242 Solving 2.071428572 + y = 1.794265242 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-2.071428572' to each side of the equation. 2.071428572 + -2.071428572 + y = 1.794265242 + -2.071428572 Combine like terms: 2.071428572 + -2.071428572 = 0.000000000 0.000000000 + y = 1.794265242 + -2.071428572 y = 1.794265242 + -2.071428572 Combine like terms: 1.794265242 + -2.071428572 = -0.27716333 y = -0.27716333 Simplifying y = -0.27716333

Subproblem 2

y + 2.071428572 = -1.794265242 Simplifying y + 2.071428572 = -1.794265242 Reorder the terms: 2.071428572 + y = -1.794265242 Solving 2.071428572 + y = -1.794265242 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-2.071428572' to each side of the equation. 2.071428572 + -2.071428572 + y = -1.794265242 + -2.071428572 Combine like terms: 2.071428572 + -2.071428572 = 0.000000000 0.000000000 + y = -1.794265242 + -2.071428572 y = -1.794265242 + -2.071428572 Combine like terms: -1.794265242 + -2.071428572 = -3.865693814 y = -3.865693814 Simplifying y = -3.865693814

Solution

The solution to the problem is based on the solutions from the subproblems. y = {-0.27716333, -3.865693814}

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