6y^2-15y+4=0

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Solution for 6y^2-15y+4=0 equation:


Simplifying
6y2 + -15y + 4 = 0

Reorder the terms:
4 + -15y + 6y2 = 0

Solving
4 + -15y + 6y2 = 0

Solving for variable 'y'.

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

Divide each side by '6'.
0.6666666667 + -2.5y + y2 = 0

Move the constant term to the right:

Add '-0.6666666667' to each side of the equation.
0.6666666667 + -2.5y + -0.6666666667 + y2 = 0 + -0.6666666667

Reorder the terms:
0.6666666667 + -0.6666666667 + -2.5y + y2 = 0 + -0.6666666667

Combine like terms: 0.6666666667 + -0.6666666667 = 0.0000000000
0.0000000000 + -2.5y + y2 = 0 + -0.6666666667
-2.5y + y2 = 0 + -0.6666666667

Combine like terms: 0 + -0.6666666667 = -0.6666666667
-2.5y + y2 = -0.6666666667

The y term is -2.5y.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5y + 1.5625 + y2 = -0.6666666667 + 1.5625

Reorder the terms:
1.5625 + -2.5y + y2 = -0.6666666667 + 1.5625

Combine like terms: -0.6666666667 + 1.5625 = 0.8958333333
1.5625 + -2.5y + y2 = 0.8958333333

Factor a perfect square on the left side:
(y + -1.25)(y + -1.25) = 0.8958333333

Calculate the square root of the right side: 0.946484724

Break this problem into two subproblems by setting 
(y + -1.25) equal to 0.946484724 and -0.946484724.

Subproblem 1

y + -1.25 = 0.946484724 Simplifying y + -1.25 = 0.946484724 Reorder the terms: -1.25 + y = 0.946484724 Solving -1.25 + y = 0.946484724 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + y = 0.946484724 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + y = 0.946484724 + 1.25 y = 0.946484724 + 1.25 Combine like terms: 0.946484724 + 1.25 = 2.196484724 y = 2.196484724 Simplifying y = 2.196484724

Subproblem 2

y + -1.25 = -0.946484724 Simplifying y + -1.25 = -0.946484724 Reorder the terms: -1.25 + y = -0.946484724 Solving -1.25 + y = -0.946484724 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + y = -0.946484724 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + y = -0.946484724 + 1.25 y = -0.946484724 + 1.25 Combine like terms: -0.946484724 + 1.25 = 0.303515276 y = 0.303515276 Simplifying y = 0.303515276

Solution

The solution to the problem is based on the solutions from the subproblems. y = {2.196484724, 0.303515276}

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