5y^2-12y+5=0

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Solution for 5y^2-12y+5=0 equation:


Simplifying
5y2 + -12y + 5 = 0

Reorder the terms:
5 + -12y + 5y2 = 0

Solving
5 + -12y + 5y2 = 0

Solving for variable 'y'.

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

Divide each side by '5'.
1 + -2.4y + y2 = 0

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + -2.4y + -1 + y2 = 0 + -1

Reorder the terms:
1 + -1 + -2.4y + y2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -2.4y + y2 = 0 + -1
-2.4y + y2 = 0 + -1

Combine like terms: 0 + -1 = -1
-2.4y + y2 = -1

The y term is -2.4y.  Take half its coefficient (-1.2).
Square it (1.44) and add it to both sides.

Add '1.44' to each side of the equation.
-2.4y + 1.44 + y2 = -1 + 1.44

Reorder the terms:
1.44 + -2.4y + y2 = -1 + 1.44

Combine like terms: -1 + 1.44 = 0.44
1.44 + -2.4y + y2 = 0.44

Factor a perfect square on the left side:
(y + -1.2)(y + -1.2) = 0.44

Calculate the square root of the right side: 0.663324958

Break this problem into two subproblems by setting 
(y + -1.2) equal to 0.663324958 and -0.663324958.

Subproblem 1

y + -1.2 = 0.663324958 Simplifying y + -1.2 = 0.663324958 Reorder the terms: -1.2 + y = 0.663324958 Solving -1.2 + y = 0.663324958 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.2' to each side of the equation. -1.2 + 1.2 + y = 0.663324958 + 1.2 Combine like terms: -1.2 + 1.2 = 0.0 0.0 + y = 0.663324958 + 1.2 y = 0.663324958 + 1.2 Combine like terms: 0.663324958 + 1.2 = 1.863324958 y = 1.863324958 Simplifying y = 1.863324958

Subproblem 2

y + -1.2 = -0.663324958 Simplifying y + -1.2 = -0.663324958 Reorder the terms: -1.2 + y = -0.663324958 Solving -1.2 + y = -0.663324958 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.2' to each side of the equation. -1.2 + 1.2 + y = -0.663324958 + 1.2 Combine like terms: -1.2 + 1.2 = 0.0 0.0 + y = -0.663324958 + 1.2 y = -0.663324958 + 1.2 Combine like terms: -0.663324958 + 1.2 = 0.536675042 y = 0.536675042 Simplifying y = 0.536675042

Solution

The solution to the problem is based on the solutions from the subproblems. y = {1.863324958, 0.536675042}

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