3y^2=18y-4

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Solution for 3y^2=18y-4 equation:


Simplifying
3y2 = 18y + -4

Reorder the terms:
3y2 = -4 + 18y

Solving
3y2 = -4 + 18y

Solving for variable 'y'.

Reorder the terms:
4 + -18y + 3y2 = -4 + 18y + 4 + -18y

Reorder the terms:
4 + -18y + 3y2 = -4 + 4 + 18y + -18y

Combine like terms: -4 + 4 = 0
4 + -18y + 3y2 = 0 + 18y + -18y
4 + -18y + 3y2 = 18y + -18y

Combine like terms: 18y + -18y = 0
4 + -18y + 3y2 = 0

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

Divide each side by '3'.
1.333333333 + -6y + y2 = 0

Move the constant term to the right:

Add '-1.333333333' to each side of the equation.
1.333333333 + -6y + -1.333333333 + y2 = 0 + -1.333333333

Reorder the terms:
1.333333333 + -1.333333333 + -6y + y2 = 0 + -1.333333333

Combine like terms: 1.333333333 + -1.333333333 = 0.000000000
0.000000000 + -6y + y2 = 0 + -1.333333333
-6y + y2 = 0 + -1.333333333

Combine like terms: 0 + -1.333333333 = -1.333333333
-6y + y2 = -1.333333333

The y term is -6y.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6y + 9 + y2 = -1.333333333 + 9

Reorder the terms:
9 + -6y + y2 = -1.333333333 + 9

Combine like terms: -1.333333333 + 9 = 7.666666667
9 + -6y + y2 = 7.666666667

Factor a perfect square on the left side:
(y + -3)(y + -3) = 7.666666667

Calculate the square root of the right side: 2.768874621

Break this problem into two subproblems by setting 
(y + -3) equal to 2.768874621 and -2.768874621.

Subproblem 1

y + -3 = 2.768874621 Simplifying y + -3 = 2.768874621 Reorder the terms: -3 + y = 2.768874621 Solving -3 + y = 2.768874621 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + y = 2.768874621 + 3 Combine like terms: -3 + 3 = 0 0 + y = 2.768874621 + 3 y = 2.768874621 + 3 Combine like terms: 2.768874621 + 3 = 5.768874621 y = 5.768874621 Simplifying y = 5.768874621

Subproblem 2

y + -3 = -2.768874621 Simplifying y + -3 = -2.768874621 Reorder the terms: -3 + y = -2.768874621 Solving -3 + y = -2.768874621 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + y = -2.768874621 + 3 Combine like terms: -3 + 3 = 0 0 + y = -2.768874621 + 3 y = -2.768874621 + 3 Combine like terms: -2.768874621 + 3 = 0.231125379 y = 0.231125379 Simplifying y = 0.231125379

Solution

The solution to the problem is based on the solutions from the subproblems. y = {5.768874621, 0.231125379}

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