y^2-2y-4=16y-32

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Solution for y^2-2y-4=16y-32 equation:


Simplifying
y2 + -2y + -4 = 16y + -32

Reorder the terms:
-4 + -2y + y2 = 16y + -32

Reorder the terms:
-4 + -2y + y2 = -32 + 16y

Solving
-4 + -2y + y2 = -32 + 16y

Solving for variable 'y'.

Reorder the terms:
-4 + 32 + -2y + -16y + y2 = -32 + 16y + 32 + -16y

Combine like terms: -4 + 32 = 28
28 + -2y + -16y + y2 = -32 + 16y + 32 + -16y

Combine like terms: -2y + -16y = -18y
28 + -18y + y2 = -32 + 16y + 32 + -16y

Reorder the terms:
28 + -18y + y2 = -32 + 32 + 16y + -16y

Combine like terms: -32 + 32 = 0
28 + -18y + y2 = 0 + 16y + -16y
28 + -18y + y2 = 16y + -16y

Combine like terms: 16y + -16y = 0
28 + -18y + y2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-28' to each side of the equation.
28 + -18y + -28 + y2 = 0 + -28

Reorder the terms:
28 + -28 + -18y + y2 = 0 + -28

Combine like terms: 28 + -28 = 0
0 + -18y + y2 = 0 + -28
-18y + y2 = 0 + -28

Combine like terms: 0 + -28 = -28
-18y + y2 = -28

The y term is -18y.  Take half its coefficient (-9).
Square it (81) and add it to both sides.

Add '81' to each side of the equation.
-18y + 81 + y2 = -28 + 81

Reorder the terms:
81 + -18y + y2 = -28 + 81

Combine like terms: -28 + 81 = 53
81 + -18y + y2 = 53

Factor a perfect square on the left side:
(y + -9)(y + -9) = 53

Calculate the square root of the right side: 7.280109889

Break this problem into two subproblems by setting 
(y + -9) equal to 7.280109889 and -7.280109889.

Subproblem 1

y + -9 = 7.280109889 Simplifying y + -9 = 7.280109889 Reorder the terms: -9 + y = 7.280109889 Solving -9 + y = 7.280109889 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + y = 7.280109889 + 9 Combine like terms: -9 + 9 = 0 0 + y = 7.280109889 + 9 y = 7.280109889 + 9 Combine like terms: 7.280109889 + 9 = 16.280109889 y = 16.280109889 Simplifying y = 16.280109889

Subproblem 2

y + -9 = -7.280109889 Simplifying y + -9 = -7.280109889 Reorder the terms: -9 + y = -7.280109889 Solving -9 + y = -7.280109889 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + y = -7.280109889 + 9 Combine like terms: -9 + 9 = 0 0 + y = -7.280109889 + 9 y = -7.280109889 + 9 Combine like terms: -7.280109889 + 9 = 1.719890111 y = 1.719890111 Simplifying y = 1.719890111

Solution

The solution to the problem is based on the solutions from the subproblems. y = {16.280109889, 1.719890111}

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