(y+3)(y-5)=2y-2

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Solution for (y+3)(y-5)=2y-2 equation:


Simplifying
(y + 3)(y + -5) = 2y + -2

Reorder the terms:
(3 + y)(y + -5) = 2y + -2

Reorder the terms:
(3 + y)(-5 + y) = 2y + -2

Multiply (3 + y) * (-5 + y)
(3(-5 + y) + y(-5 + y)) = 2y + -2
((-5 * 3 + y * 3) + y(-5 + y)) = 2y + -2
((-15 + 3y) + y(-5 + y)) = 2y + -2
(-15 + 3y + (-5 * y + y * y)) = 2y + -2
(-15 + 3y + (-5y + y2)) = 2y + -2

Combine like terms: 3y + -5y = -2y
(-15 + -2y + y2) = 2y + -2

Reorder the terms:
-15 + -2y + y2 = -2 + 2y

Solving
-15 + -2y + y2 = -2 + 2y

Solving for variable 'y'.

Reorder the terms:
-15 + 2 + -2y + -2y + y2 = -2 + 2y + 2 + -2y

Combine like terms: -15 + 2 = -13
-13 + -2y + -2y + y2 = -2 + 2y + 2 + -2y

Combine like terms: -2y + -2y = -4y
-13 + -4y + y2 = -2 + 2y + 2 + -2y

Reorder the terms:
-13 + -4y + y2 = -2 + 2 + 2y + -2y

Combine like terms: -2 + 2 = 0
-13 + -4y + y2 = 0 + 2y + -2y
-13 + -4y + y2 = 2y + -2y

Combine like terms: 2y + -2y = 0
-13 + -4y + y2 = 0

Begin completing the square.

Move the constant term to the right:

Add '13' to each side of the equation.
-13 + -4y + 13 + y2 = 0 + 13

Reorder the terms:
-13 + 13 + -4y + y2 = 0 + 13

Combine like terms: -13 + 13 = 0
0 + -4y + y2 = 0 + 13
-4y + y2 = 0 + 13

Combine like terms: 0 + 13 = 13
-4y + y2 = 13

The y term is -4y.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4y + 4 + y2 = 13 + 4

Reorder the terms:
4 + -4y + y2 = 13 + 4

Combine like terms: 13 + 4 = 17
4 + -4y + y2 = 17

Factor a perfect square on the left side:
(y + -2)(y + -2) = 17

Calculate the square root of the right side: 4.123105626

Break this problem into two subproblems by setting 
(y + -2) equal to 4.123105626 and -4.123105626.

Subproblem 1

y + -2 = 4.123105626 Simplifying y + -2 = 4.123105626 Reorder the terms: -2 + y = 4.123105626 Solving -2 + y = 4.123105626 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + y = 4.123105626 + 2 Combine like terms: -2 + 2 = 0 0 + y = 4.123105626 + 2 y = 4.123105626 + 2 Combine like terms: 4.123105626 + 2 = 6.123105626 y = 6.123105626 Simplifying y = 6.123105626

Subproblem 2

y + -2 = -4.123105626 Simplifying y + -2 = -4.123105626 Reorder the terms: -2 + y = -4.123105626 Solving -2 + y = -4.123105626 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + y = -4.123105626 + 2 Combine like terms: -2 + 2 = 0 0 + y = -4.123105626 + 2 y = -4.123105626 + 2 Combine like terms: -4.123105626 + 2 = -2.123105626 y = -2.123105626 Simplifying y = -2.123105626

Solution

The solution to the problem is based on the solutions from the subproblems. y = {6.123105626, -2.123105626}

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