(28y^2)-4y=1

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Solution for (28y^2)-4y=1 equation:


Simplifying
(28y2) + -4y = 1

Reorder the terms:
-4y + (28y2) = 1

Solving
-4y + (28y2) = 1

Solving for variable 'y'.

Reorder the terms:
-1 + -4y + (28y2) = 1 + -1

Combine like terms: 1 + -1 = 0
-1 + -4y + (28y2) = 0

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

Divide each side by '28'.
-0.03571428571 + -0.1428571429y + y2 = 0

Move the constant term to the right:

Add '0.03571428571' to each side of the equation.
-0.03571428571 + -0.1428571429y + 0.03571428571 + y2 = 0 + 0.03571428571

Reorder the terms:
-0.03571428571 + 0.03571428571 + -0.1428571429y + y2 = 0 + 0.03571428571

Combine like terms: -0.03571428571 + 0.03571428571 = 0.00000000000
0.00000000000 + -0.1428571429y + y2 = 0 + 0.03571428571
-0.1428571429y + y2 = 0 + 0.03571428571

Combine like terms: 0 + 0.03571428571 = 0.03571428571
-0.1428571429y + y2 = 0.03571428571

The y term is -0.1428571429y.  Take half its coefficient (-0.07142857145).
Square it (0.005102040819) and add it to both sides.

Add '0.005102040819' to each side of the equation.
-0.1428571429y + 0.005102040819 + y2 = 0.03571428571 + 0.005102040819

Reorder the terms:
0.005102040819 + -0.1428571429y + y2 = 0.03571428571 + 0.005102040819

Combine like terms: 0.03571428571 + 0.005102040819 = 0.040816326529
0.005102040819 + -0.1428571429y + y2 = 0.040816326529

Factor a perfect square on the left side:
((y) + -0.07142857145)((y) + -0.07142857145) = 0.040816326529

Calculate the square root of the right side: 0.202030509

Break this problem into two subproblems by setting 
((y) + -0.07142857145) equal to 0.202030509 and -0.202030509.

Subproblem 1

(y) + -0.07142857145 = 0.202030509 Simplifying (y) + -0.07142857145 = 0.202030509 y + -0.07142857145 = 0.202030509 Reorder the terms: -0.07142857145 + y = 0.202030509 Solving -0.07142857145 + y = 0.202030509 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.07142857145' to each side of the equation. -0.07142857145 + 0.07142857145 + y = 0.202030509 + 0.07142857145 Combine like terms: -0.07142857145 + 0.07142857145 = 0.00000000000 0.00000000000 + y = 0.202030509 + 0.07142857145 y = 0.202030509 + 0.07142857145 Combine like terms: 0.202030509 + 0.07142857145 = 0.27345908045 y = 0.27345908045 Simplifying y = 0.27345908045

Subproblem 2

(y) + -0.07142857145 = -0.202030509 Simplifying (y) + -0.07142857145 = -0.202030509 y + -0.07142857145 = -0.202030509 Reorder the terms: -0.07142857145 + y = -0.202030509 Solving -0.07142857145 + y = -0.202030509 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.07142857145' to each side of the equation. -0.07142857145 + 0.07142857145 + y = -0.202030509 + 0.07142857145 Combine like terms: -0.07142857145 + 0.07142857145 = 0.00000000000 0.00000000000 + y = -0.202030509 + 0.07142857145 y = -0.202030509 + 0.07142857145 Combine like terms: -0.202030509 + 0.07142857145 = -0.13060193755 y = -0.13060193755 Simplifying y = -0.13060193755

Solution

The solution to the problem is based on the solutions from the subproblems. y = {0.27345908045, -0.13060193755}

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