0.18y(y-3)+0.06=0.08y-0.3

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Solution for 0.18y(y-3)+0.06=0.08y-0.3 equation:


Simplifying
0.18y(y + -3) + 0.06 = 0.08y + -0.3

Reorder the terms:
0.18y(-3 + y) + 0.06 = 0.08y + -0.3
(-3 * 0.18y + y * 0.18y) + 0.06 = 0.08y + -0.3
(-0.54y + 0.18y2) + 0.06 = 0.08y + -0.3

Reorder the terms:
0.06 + -0.54y + 0.18y2 = 0.08y + -0.3

Reorder the terms:
0.06 + -0.54y + 0.18y2 = -0.3 + 0.08y

Solving
0.06 + -0.54y + 0.18y2 = -0.3 + 0.08y

Solving for variable 'y'.

Reorder the terms:
0.06 + 0.3 + -0.54y + -0.08y + 0.18y2 = -0.3 + 0.08y + 0.3 + -0.08y

Combine like terms: 0.06 + 0.3 = 0.36
0.36 + -0.54y + -0.08y + 0.18y2 = -0.3 + 0.08y + 0.3 + -0.08y

Combine like terms: -0.54y + -0.08y = -0.62y
0.36 + -0.62y + 0.18y2 = -0.3 + 0.08y + 0.3 + -0.08y

Reorder the terms:
0.36 + -0.62y + 0.18y2 = -0.3 + 0.3 + 0.08y + -0.08y

Combine like terms: -0.3 + 0.3 = 0.0
0.36 + -0.62y + 0.18y2 = 0.0 + 0.08y + -0.08y
0.36 + -0.62y + 0.18y2 = 0.08y + -0.08y

Combine like terms: 0.08y + -0.08y = 0.00
0.36 + -0.62y + 0.18y2 = 0.00

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

Divide each side by '0.18'.
2 + -3.444444444y + y2 = 0

Move the constant term to the right:

Add '-2' to each side of the equation.
2 + -3.444444444y + -2 + y2 = 0 + -2

Reorder the terms:
2 + -2 + -3.444444444y + y2 = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -3.444444444y + y2 = 0 + -2
-3.444444444y + y2 = 0 + -2

Combine like terms: 0 + -2 = -2
-3.444444444y + y2 = -2

The y term is -3.444444444y.  Take half its coefficient (-1.722222222).
Square it (2.966049382) and add it to both sides.

Add '2.966049382' to each side of the equation.
-3.444444444y + 2.966049382 + y2 = -2 + 2.966049382

Reorder the terms:
2.966049382 + -3.444444444y + y2 = -2 + 2.966049382

Combine like terms: -2 + 2.966049382 = 0.966049382
2.966049382 + -3.444444444y + y2 = 0.966049382

Factor a perfect square on the left side:
(y + -1.722222222)(y + -1.722222222) = 0.966049382

Calculate the square root of the right side: 0.982878111

Break this problem into two subproblems by setting 
(y + -1.722222222) equal to 0.982878111 and -0.982878111.

Subproblem 1

y + -1.722222222 = 0.982878111 Simplifying y + -1.722222222 = 0.982878111 Reorder the terms: -1.722222222 + y = 0.982878111 Solving -1.722222222 + y = 0.982878111 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.722222222' to each side of the equation. -1.722222222 + 1.722222222 + y = 0.982878111 + 1.722222222 Combine like terms: -1.722222222 + 1.722222222 = 0.000000000 0.000000000 + y = 0.982878111 + 1.722222222 y = 0.982878111 + 1.722222222 Combine like terms: 0.982878111 + 1.722222222 = 2.705100333 y = 2.705100333 Simplifying y = 2.705100333

Subproblem 2

y + -1.722222222 = -0.982878111 Simplifying y + -1.722222222 = -0.982878111 Reorder the terms: -1.722222222 + y = -0.982878111 Solving -1.722222222 + y = -0.982878111 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.722222222' to each side of the equation. -1.722222222 + 1.722222222 + y = -0.982878111 + 1.722222222 Combine like terms: -1.722222222 + 1.722222222 = 0.000000000 0.000000000 + y = -0.982878111 + 1.722222222 y = -0.982878111 + 1.722222222 Combine like terms: -0.982878111 + 1.722222222 = 0.739344111 y = 0.739344111 Simplifying y = 0.739344111

Solution

The solution to the problem is based on the solutions from the subproblems. y = {2.705100333, 0.739344111}

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