7y(18y-33)=167

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Solution for 7y(18y-33)=167 equation:


Simplifying
7y(18y + -33) = 167

Reorder the terms:
7y(-33 + 18y) = 167
(-33 * 7y + 18y * 7y) = 167
(-231y + 126y2) = 167

Solving
-231y + 126y2 = 167

Solving for variable 'y'.

Reorder the terms:
-167 + -231y + 126y2 = 167 + -167

Combine like terms: 167 + -167 = 0
-167 + -231y + 126y2 = 0

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

Divide each side by '126'.
-1.325396825 + -1.833333333y + y2 = 0

Move the constant term to the right:

Add '1.325396825' to each side of the equation.
-1.325396825 + -1.833333333y + 1.325396825 + y2 = 0 + 1.325396825

Reorder the terms:
-1.325396825 + 1.325396825 + -1.833333333y + y2 = 0 + 1.325396825

Combine like terms: -1.325396825 + 1.325396825 = 0.000000000
0.000000000 + -1.833333333y + y2 = 0 + 1.325396825
-1.833333333y + y2 = 0 + 1.325396825

Combine like terms: 0 + 1.325396825 = 1.325396825
-1.833333333y + y2 = 1.325396825

The y term is -1.833333333y.  Take half its coefficient (-0.9166666665).
Square it (0.8402777775) and add it to both sides.

Add '0.8402777775' to each side of the equation.
-1.833333333y + 0.8402777775 + y2 = 1.325396825 + 0.8402777775

Reorder the terms:
0.8402777775 + -1.833333333y + y2 = 1.325396825 + 0.8402777775

Combine like terms: 1.325396825 + 0.8402777775 = 2.1656746025
0.8402777775 + -1.833333333y + y2 = 2.1656746025

Factor a perfect square on the left side:
(y + -0.9166666665)(y + -0.9166666665) = 2.1656746025

Calculate the square root of the right side: 1.471623118

Break this problem into two subproblems by setting 
(y + -0.9166666665) equal to 1.471623118 and -1.471623118.

Subproblem 1

y + -0.9166666665 = 1.471623118 Simplifying y + -0.9166666665 = 1.471623118 Reorder the terms: -0.9166666665 + y = 1.471623118 Solving -0.9166666665 + y = 1.471623118 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.9166666665' to each side of the equation. -0.9166666665 + 0.9166666665 + y = 1.471623118 + 0.9166666665 Combine like terms: -0.9166666665 + 0.9166666665 = 0.0000000000 0.0000000000 + y = 1.471623118 + 0.9166666665 y = 1.471623118 + 0.9166666665 Combine like terms: 1.471623118 + 0.9166666665 = 2.3882897845 y = 2.3882897845 Simplifying y = 2.3882897845

Subproblem 2

y + -0.9166666665 = -1.471623118 Simplifying y + -0.9166666665 = -1.471623118 Reorder the terms: -0.9166666665 + y = -1.471623118 Solving -0.9166666665 + y = -1.471623118 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.9166666665' to each side of the equation. -0.9166666665 + 0.9166666665 + y = -1.471623118 + 0.9166666665 Combine like terms: -0.9166666665 + 0.9166666665 = 0.0000000000 0.0000000000 + y = -1.471623118 + 0.9166666665 y = -1.471623118 + 0.9166666665 Combine like terms: -1.471623118 + 0.9166666665 = -0.5549564515 y = -0.5549564515 Simplifying y = -0.5549564515

Solution

The solution to the problem is based on the solutions from the subproblems. y = {2.3882897845, -0.5549564515}

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