4y^2-19y+5=0

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Solution for 4y^2-19y+5=0 equation:


Simplifying
4y2 + -19y + 5 = 0

Reorder the terms:
5 + -19y + 4y2 = 0

Solving
5 + -19y + 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'.
1.25 + -4.75y + y2 = 0

Move the constant term to the right:

Add '-1.25' to each side of the equation.
1.25 + -4.75y + -1.25 + y2 = 0 + -1.25

Reorder the terms:
1.25 + -1.25 + -4.75y + y2 = 0 + -1.25

Combine like terms: 1.25 + -1.25 = 0.00
0.00 + -4.75y + y2 = 0 + -1.25
-4.75y + y2 = 0 + -1.25

Combine like terms: 0 + -1.25 = -1.25
-4.75y + y2 = -1.25

The y term is -4.75y.  Take half its coefficient (-2.375).
Square it (5.640625) and add it to both sides.

Add '5.640625' to each side of the equation.
-4.75y + 5.640625 + y2 = -1.25 + 5.640625

Reorder the terms:
5.640625 + -4.75y + y2 = -1.25 + 5.640625

Combine like terms: -1.25 + 5.640625 = 4.390625
5.640625 + -4.75y + y2 = 4.390625

Factor a perfect square on the left side:
(y + -2.375)(y + -2.375) = 4.390625

Calculate the square root of the right side: 2.095381827

Break this problem into two subproblems by setting 
(y + -2.375) equal to 2.095381827 and -2.095381827.

Subproblem 1

y + -2.375 = 2.095381827 Simplifying y + -2.375 = 2.095381827 Reorder the terms: -2.375 + y = 2.095381827 Solving -2.375 + y = 2.095381827 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '2.375' to each side of the equation. -2.375 + 2.375 + y = 2.095381827 + 2.375 Combine like terms: -2.375 + 2.375 = 0.000 0.000 + y = 2.095381827 + 2.375 y = 2.095381827 + 2.375 Combine like terms: 2.095381827 + 2.375 = 4.470381827 y = 4.470381827 Simplifying y = 4.470381827

Subproblem 2

y + -2.375 = -2.095381827 Simplifying y + -2.375 = -2.095381827 Reorder the terms: -2.375 + y = -2.095381827 Solving -2.375 + y = -2.095381827 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '2.375' to each side of the equation. -2.375 + 2.375 + y = -2.095381827 + 2.375 Combine like terms: -2.375 + 2.375 = 0.000 0.000 + y = -2.095381827 + 2.375 y = -2.095381827 + 2.375 Combine like terms: -2.095381827 + 2.375 = 0.279618173 y = 0.279618173 Simplifying y = 0.279618173

Solution

The solution to the problem is based on the solutions from the subproblems. y = {4.470381827, 0.279618173}

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