1=(y-3)(y-6)

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Solution for 1=(y-3)(y-6) equation:


Simplifying
1 = (y + -3)(y + -6)

Reorder the terms:
1 = (-3 + y)(y + -6)

Reorder the terms:
1 = (-3 + y)(-6 + y)

Multiply (-3 + y) * (-6 + y)
1 = (-3(-6 + y) + y(-6 + y))
1 = ((-6 * -3 + y * -3) + y(-6 + y))
1 = ((18 + -3y) + y(-6 + y))
1 = (18 + -3y + (-6 * y + y * y))
1 = (18 + -3y + (-6y + y2))

Combine like terms: -3y + -6y = -9y
1 = (18 + -9y + y2)

Solving
1 = 18 + -9y + y2

Solving for variable 'y'.

Combine like terms: 1 + -18 = -17
-17 + 9y + -1y2 = 18 + -9y + y2 + -18 + 9y + -1y2

Reorder the terms:
-17 + 9y + -1y2 = 18 + -18 + -9y + 9y + y2 + -1y2

Combine like terms: 18 + -18 = 0
-17 + 9y + -1y2 = 0 + -9y + 9y + y2 + -1y2
-17 + 9y + -1y2 = -9y + 9y + y2 + -1y2

Combine like terms: -9y + 9y = 0
-17 + 9y + -1y2 = 0 + y2 + -1y2
-17 + 9y + -1y2 = y2 + -1y2

Combine like terms: y2 + -1y2 = 0
-17 + 9y + -1y2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
17 + -9y + y2 = 0

Move the constant term to the right:

Add '-17' to each side of the equation.
17 + -9y + -17 + y2 = 0 + -17

Reorder the terms:
17 + -17 + -9y + y2 = 0 + -17

Combine like terms: 17 + -17 = 0
0 + -9y + y2 = 0 + -17
-9y + y2 = 0 + -17

Combine like terms: 0 + -17 = -17
-9y + y2 = -17

The y term is -9y.  Take half its coefficient (-4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
-9y + 20.25 + y2 = -17 + 20.25

Reorder the terms:
20.25 + -9y + y2 = -17 + 20.25

Combine like terms: -17 + 20.25 = 3.25
20.25 + -9y + y2 = 3.25

Factor a perfect square on the left side:
(y + -4.5)(y + -4.5) = 3.25

Calculate the square root of the right side: 1.802775638

Break this problem into two subproblems by setting 
(y + -4.5) equal to 1.802775638 and -1.802775638.

Subproblem 1

y + -4.5 = 1.802775638 Simplifying y + -4.5 = 1.802775638 Reorder the terms: -4.5 + y = 1.802775638 Solving -4.5 + y = 1.802775638 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + y = 1.802775638 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + y = 1.802775638 + 4.5 y = 1.802775638 + 4.5 Combine like terms: 1.802775638 + 4.5 = 6.302775638 y = 6.302775638 Simplifying y = 6.302775638

Subproblem 2

y + -4.5 = -1.802775638 Simplifying y + -4.5 = -1.802775638 Reorder the terms: -4.5 + y = -1.802775638 Solving -4.5 + y = -1.802775638 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + y = -1.802775638 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + y = -1.802775638 + 4.5 y = -1.802775638 + 4.5 Combine like terms: -1.802775638 + 4.5 = 2.697224362 y = 2.697224362 Simplifying y = 2.697224362

Solution

The solution to the problem is based on the solutions from the subproblems. y = {6.302775638, 2.697224362}

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