4y^2-16y+1=0

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Solution for 4y^2-16y+1=0 equation:


Simplifying
4y2 + -16y + 1 = 0

Reorder the terms:
1 + -16y + 4y2 = 0

Solving
1 + -16y + 4y2 = 0

Solving for variable 'y'.

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

Divide each side by '4'.
0.25 + -4y + y2 = 0

Move the constant term to the right:

Add '-0.25' to each side of the equation.
0.25 + -4y + -0.25 + y2 = 0 + -0.25

Reorder the terms:
0.25 + -0.25 + -4y + y2 = 0 + -0.25

Combine like terms: 0.25 + -0.25 = 0.00
0.00 + -4y + y2 = 0 + -0.25
-4y + y2 = 0 + -0.25

Combine like terms: 0 + -0.25 = -0.25
-4y + y2 = -0.25

The y term is -4y.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4y + 4 + y2 = -0.25 + 4

Reorder the terms:
4 + -4y + y2 = -0.25 + 4

Combine like terms: -0.25 + 4 = 3.75
4 + -4y + y2 = 3.75

Factor a perfect square on the left side:
(y + -2)(y + -2) = 3.75

Calculate the square root of the right side: 1.936491673

Break this problem into two subproblems by setting 
(y + -2) equal to 1.936491673 and -1.936491673.

Subproblem 1

y + -2 = 1.936491673 Simplifying y + -2 = 1.936491673 Reorder the terms: -2 + y = 1.936491673 Solving -2 + y = 1.936491673 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + y = 1.936491673 + 2 Combine like terms: -2 + 2 = 0 0 + y = 1.936491673 + 2 y = 1.936491673 + 2 Combine like terms: 1.936491673 + 2 = 3.936491673 y = 3.936491673 Simplifying y = 3.936491673

Subproblem 2

y + -2 = -1.936491673 Simplifying y + -2 = -1.936491673 Reorder the terms: -2 + y = -1.936491673 Solving -2 + y = -1.936491673 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + y = -1.936491673 + 2 Combine like terms: -2 + 2 = 0 0 + y = -1.936491673 + 2 y = -1.936491673 + 2 Combine like terms: -1.936491673 + 2 = 0.063508327 y = 0.063508327 Simplifying y = 0.063508327

Solution

The solution to the problem is based on the solutions from the subproblems. y = {3.936491673, 0.063508327}

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