14y^2+15y-3=0

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Solution for 14y^2+15y-3=0 equation:


Simplifying
14y2 + 15y + -3 = 0

Reorder the terms:
-3 + 15y + 14y2 = 0

Solving
-3 + 15y + 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'.
-0.2142857143 + 1.071428571y + y2 = 0

Move the constant term to the right:

Add '0.2142857143' to each side of the equation.
-0.2142857143 + 1.071428571y + 0.2142857143 + y2 = 0 + 0.2142857143

Reorder the terms:
-0.2142857143 + 0.2142857143 + 1.071428571y + y2 = 0 + 0.2142857143

Combine like terms: -0.2142857143 + 0.2142857143 = 0.0000000000
0.0000000000 + 1.071428571y + y2 = 0 + 0.2142857143
1.071428571y + y2 = 0 + 0.2142857143

Combine like terms: 0 + 0.2142857143 = 0.2142857143
1.071428571y + y2 = 0.2142857143

The y term is 1.071428571y.  Take half its coefficient (0.5357142855).
Square it (0.2869897957) and add it to both sides.

Add '0.2869897957' to each side of the equation.
1.071428571y + 0.2869897957 + y2 = 0.2142857143 + 0.2869897957

Reorder the terms:
0.2869897957 + 1.071428571y + y2 = 0.2142857143 + 0.2869897957

Combine like terms: 0.2142857143 + 0.2869897957 = 0.50127551
0.2869897957 + 1.071428571y + y2 = 0.50127551

Factor a perfect square on the left side:
(y + 0.5357142855)(y + 0.5357142855) = 0.50127551

Calculate the square root of the right side: 0.708008128

Break this problem into two subproblems by setting 
(y + 0.5357142855) equal to 0.708008128 and -0.708008128.

Subproblem 1

y + 0.5357142855 = 0.708008128 Simplifying y + 0.5357142855 = 0.708008128 Reorder the terms: 0.5357142855 + y = 0.708008128 Solving 0.5357142855 + y = 0.708008128 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.5357142855' to each side of the equation. 0.5357142855 + -0.5357142855 + y = 0.708008128 + -0.5357142855 Combine like terms: 0.5357142855 + -0.5357142855 = 0.0000000000 0.0000000000 + y = 0.708008128 + -0.5357142855 y = 0.708008128 + -0.5357142855 Combine like terms: 0.708008128 + -0.5357142855 = 0.1722938425 y = 0.1722938425 Simplifying y = 0.1722938425

Subproblem 2

y + 0.5357142855 = -0.708008128 Simplifying y + 0.5357142855 = -0.708008128 Reorder the terms: 0.5357142855 + y = -0.708008128 Solving 0.5357142855 + y = -0.708008128 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.5357142855' to each side of the equation. 0.5357142855 + -0.5357142855 + y = -0.708008128 + -0.5357142855 Combine like terms: 0.5357142855 + -0.5357142855 = 0.0000000000 0.0000000000 + y = -0.708008128 + -0.5357142855 y = -0.708008128 + -0.5357142855 Combine like terms: -0.708008128 + -0.5357142855 = -1.2437224135 y = -1.2437224135 Simplifying y = -1.2437224135

Solution

The solution to the problem is based on the solutions from the subproblems. y = {0.1722938425, -1.2437224135}

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