3y^2-3y=2

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Solution for 3y^2-3y=2 equation:


Simplifying
3y2 + -3y = 2

Reorder the terms:
-3y + 3y2 = 2

Solving
-3y + 3y2 = 2

Solving for variable 'y'.

Reorder the terms:
-2 + -3y + 3y2 = 2 + -2

Combine like terms: 2 + -2 = 0
-2 + -3y + 3y2 = 0

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

Divide each side by '3'.
-0.6666666667 + -1y + y2 = 0

Move the constant term to the right:

Add '0.6666666667' to each side of the equation.
-0.6666666667 + -1y + 0.6666666667 + y2 = 0 + 0.6666666667

Reorder the terms:
-0.6666666667 + 0.6666666667 + -1y + y2 = 0 + 0.6666666667

Combine like terms: -0.6666666667 + 0.6666666667 = 0.0000000000
0.0000000000 + -1y + y2 = 0 + 0.6666666667
-1y + y2 = 0 + 0.6666666667

Combine like terms: 0 + 0.6666666667 = 0.6666666667
-1y + y2 = 0.6666666667

The y term is -1y.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1y + 0.25 + y2 = 0.6666666667 + 0.25

Reorder the terms:
0.25 + -1y + y2 = 0.6666666667 + 0.25

Combine like terms: 0.6666666667 + 0.25 = 0.9166666667
0.25 + -1y + y2 = 0.9166666667

Factor a perfect square on the left side:
(y + -0.5)(y + -0.5) = 0.9166666667

Calculate the square root of the right side: 0.957427108

Break this problem into two subproblems by setting 
(y + -0.5) equal to 0.957427108 and -0.957427108.

Subproblem 1

y + -0.5 = 0.957427108 Simplifying y + -0.5 = 0.957427108 Reorder the terms: -0.5 + y = 0.957427108 Solving -0.5 + y = 0.957427108 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + y = 0.957427108 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + y = 0.957427108 + 0.5 y = 0.957427108 + 0.5 Combine like terms: 0.957427108 + 0.5 = 1.457427108 y = 1.457427108 Simplifying y = 1.457427108

Subproblem 2

y + -0.5 = -0.957427108 Simplifying y + -0.5 = -0.957427108 Reorder the terms: -0.5 + y = -0.957427108 Solving -0.5 + y = -0.957427108 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + y = -0.957427108 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + y = -0.957427108 + 0.5 y = -0.957427108 + 0.5 Combine like terms: -0.957427108 + 0.5 = -0.457427108 y = -0.457427108 Simplifying y = -0.457427108

Solution

The solution to the problem is based on the solutions from the subproblems. y = {1.457427108, -0.457427108}

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