(5y-1)(y-1)=50

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Solution for (5y-1)(y-1)=50 equation:


Simplifying
(5y + -1)(y + -1) = 50

Reorder the terms:
(-1 + 5y)(y + -1) = 50

Reorder the terms:
(-1 + 5y)(-1 + y) = 50

Multiply (-1 + 5y) * (-1 + y)
(-1(-1 + y) + 5y * (-1 + y)) = 50
((-1 * -1 + y * -1) + 5y * (-1 + y)) = 50
((1 + -1y) + 5y * (-1 + y)) = 50
(1 + -1y + (-1 * 5y + y * 5y)) = 50
(1 + -1y + (-5y + 5y2)) = 50

Combine like terms: -1y + -5y = -6y
(1 + -6y + 5y2) = 50

Solving
1 + -6y + 5y2 = 50

Solving for variable 'y'.

Reorder the terms:
1 + -50 + -6y + 5y2 = 50 + -50

Combine like terms: 1 + -50 = -49
-49 + -6y + 5y2 = 50 + -50

Combine like terms: 50 + -50 = 0
-49 + -6y + 5y2 = 0

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

Divide each side by '5'.
-9.8 + -1.2y + y2 = 0

Move the constant term to the right:

Add '9.8' to each side of the equation.
-9.8 + -1.2y + 9.8 + y2 = 0 + 9.8

Reorder the terms:
-9.8 + 9.8 + -1.2y + y2 = 0 + 9.8

Combine like terms: -9.8 + 9.8 = 0.0
0.0 + -1.2y + y2 = 0 + 9.8
-1.2y + y2 = 0 + 9.8

Combine like terms: 0 + 9.8 = 9.8
-1.2y + y2 = 9.8

The y term is -1.2y.  Take half its coefficient (-0.6).
Square it (0.36) and add it to both sides.

Add '0.36' to each side of the equation.
-1.2y + 0.36 + y2 = 9.8 + 0.36

Reorder the terms:
0.36 + -1.2y + y2 = 9.8 + 0.36

Combine like terms: 9.8 + 0.36 = 10.16
0.36 + -1.2y + y2 = 10.16

Factor a perfect square on the left side:
(y + -0.6)(y + -0.6) = 10.16

Calculate the square root of the right side: 3.18747549

Break this problem into two subproblems by setting 
(y + -0.6) equal to 3.18747549 and -3.18747549.

Subproblem 1

y + -0.6 = 3.18747549 Simplifying y + -0.6 = 3.18747549 Reorder the terms: -0.6 + y = 3.18747549 Solving -0.6 + y = 3.18747549 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.6' to each side of the equation. -0.6 + 0.6 + y = 3.18747549 + 0.6 Combine like terms: -0.6 + 0.6 = 0.0 0.0 + y = 3.18747549 + 0.6 y = 3.18747549 + 0.6 Combine like terms: 3.18747549 + 0.6 = 3.78747549 y = 3.78747549 Simplifying y = 3.78747549

Subproblem 2

y + -0.6 = -3.18747549 Simplifying y + -0.6 = -3.18747549 Reorder the terms: -0.6 + y = -3.18747549 Solving -0.6 + y = -3.18747549 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.6' to each side of the equation. -0.6 + 0.6 + y = -3.18747549 + 0.6 Combine like terms: -0.6 + 0.6 = 0.0 0.0 + y = -3.18747549 + 0.6 y = -3.18747549 + 0.6 Combine like terms: -3.18747549 + 0.6 = -2.58747549 y = -2.58747549 Simplifying y = -2.58747549

Solution

The solution to the problem is based on the solutions from the subproblems. y = {3.78747549, -2.58747549}

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