0.12y(y-6)+0.04y=0.08y-0.7

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Solution for 0.12y(y-6)+0.04y=0.08y-0.7 equation:


Simplifying
0.12y(y + -6) + 0.04y = 0.08y + -0.7

Reorder the terms:
0.12y(-6 + y) + 0.04y = 0.08y + -0.7
(-6 * 0.12y + y * 0.12y) + 0.04y = 0.08y + -0.7
(-0.72y + 0.12y2) + 0.04y = 0.08y + -0.7

Reorder the terms:
-0.72y + 0.04y + 0.12y2 = 0.08y + -0.7

Combine like terms: -0.72y + 0.04y = -0.68y
-0.68y + 0.12y2 = 0.08y + -0.7

Reorder the terms:
-0.68y + 0.12y2 = -0.7 + 0.08y

Solving
-0.68y + 0.12y2 = -0.7 + 0.08y

Solving for variable 'y'.

Reorder the terms:
0.7 + -0.68y + -0.08y + 0.12y2 = -0.7 + 0.08y + 0.7 + -0.08y

Combine like terms: -0.68y + -0.08y = -0.76y
0.7 + -0.76y + 0.12y2 = -0.7 + 0.08y + 0.7 + -0.08y

Reorder the terms:
0.7 + -0.76y + 0.12y2 = -0.7 + 0.7 + 0.08y + -0.08y

Combine like terms: -0.7 + 0.7 = 0.0
0.7 + -0.76y + 0.12y2 = 0.0 + 0.08y + -0.08y
0.7 + -0.76y + 0.12y2 = 0.08y + -0.08y

Combine like terms: 0.08y + -0.08y = 0.00
0.7 + -0.76y + 0.12y2 = 0.00

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

Divide each side by '0.12'.
5.833333333 + -6.333333333y + y2 = 0

Move the constant term to the right:

Add '-5.833333333' to each side of the equation.
5.833333333 + -6.333333333y + -5.833333333 + y2 = 0 + -5.833333333

Reorder the terms:
5.833333333 + -5.833333333 + -6.333333333y + y2 = 0 + -5.833333333

Combine like terms: 5.833333333 + -5.833333333 = 0.000000000
0.000000000 + -6.333333333y + y2 = 0 + -5.833333333
-6.333333333y + y2 = 0 + -5.833333333

Combine like terms: 0 + -5.833333333 = -5.833333333
-6.333333333y + y2 = -5.833333333

The y term is -6.333333333y.  Take half its coefficient (-3.166666667).
Square it (10.02777778) and add it to both sides.

Add '10.02777778' to each side of the equation.
-6.333333333y + 10.02777778 + y2 = -5.833333333 + 10.02777778

Reorder the terms:
10.02777778 + -6.333333333y + y2 = -5.833333333 + 10.02777778

Combine like terms: -5.833333333 + 10.02777778 = 4.194444447
10.02777778 + -6.333333333y + y2 = 4.194444447

Factor a perfect square on the left side:
(y + -3.166666667)(y + -3.166666667) = 4.194444447

Calculate the square root of the right side: 2.048034289

Break this problem into two subproblems by setting 
(y + -3.166666667) equal to 2.048034289 and -2.048034289.

Subproblem 1

y + -3.166666667 = 2.048034289 Simplifying y + -3.166666667 = 2.048034289 Reorder the terms: -3.166666667 + y = 2.048034289 Solving -3.166666667 + y = 2.048034289 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '3.166666667' to each side of the equation. -3.166666667 + 3.166666667 + y = 2.048034289 + 3.166666667 Combine like terms: -3.166666667 + 3.166666667 = 0.000000000 0.000000000 + y = 2.048034289 + 3.166666667 y = 2.048034289 + 3.166666667 Combine like terms: 2.048034289 + 3.166666667 = 5.214700956 y = 5.214700956 Simplifying y = 5.214700956

Subproblem 2

y + -3.166666667 = -2.048034289 Simplifying y + -3.166666667 = -2.048034289 Reorder the terms: -3.166666667 + y = -2.048034289 Solving -3.166666667 + y = -2.048034289 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '3.166666667' to each side of the equation. -3.166666667 + 3.166666667 + y = -2.048034289 + 3.166666667 Combine like terms: -3.166666667 + 3.166666667 = 0.000000000 0.000000000 + y = -2.048034289 + 3.166666667 y = -2.048034289 + 3.166666667 Combine like terms: -2.048034289 + 3.166666667 = 1.118632378 y = 1.118632378 Simplifying y = 1.118632378

Solution

The solution to the problem is based on the solutions from the subproblems. y = {5.214700956, 1.118632378}

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