y^2-12y=4

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Solution for y^2-12y=4 equation:


Simplifying
y2 + -12y = 4

Reorder the terms:
-12y + y2 = 4

Solving
-12y + y2 = 4

Solving for variable 'y'.

Reorder the terms:
-4 + -12y + y2 = 4 + -4

Combine like terms: 4 + -4 = 0
-4 + -12y + y2 = 0

Begin completing the square.

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + -12y + 4 + y2 = 0 + 4

Reorder the terms:
-4 + 4 + -12y + y2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + -12y + y2 = 0 + 4
-12y + y2 = 0 + 4

Combine like terms: 0 + 4 = 4
-12y + y2 = 4

The y term is -12y.  Take half its coefficient (-6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
-12y + 36 + y2 = 4 + 36

Reorder the terms:
36 + -12y + y2 = 4 + 36

Combine like terms: 4 + 36 = 40
36 + -12y + y2 = 40

Factor a perfect square on the left side:
(y + -6)(y + -6) = 40

Calculate the square root of the right side: 6.32455532

Break this problem into two subproblems by setting 
(y + -6) equal to 6.32455532 and -6.32455532.

Subproblem 1

y + -6 = 6.32455532 Simplifying y + -6 = 6.32455532 Reorder the terms: -6 + y = 6.32455532 Solving -6 + y = 6.32455532 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + y = 6.32455532 + 6 Combine like terms: -6 + 6 = 0 0 + y = 6.32455532 + 6 y = 6.32455532 + 6 Combine like terms: 6.32455532 + 6 = 12.32455532 y = 12.32455532 Simplifying y = 12.32455532

Subproblem 2

y + -6 = -6.32455532 Simplifying y + -6 = -6.32455532 Reorder the terms: -6 + y = -6.32455532 Solving -6 + y = -6.32455532 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + y = -6.32455532 + 6 Combine like terms: -6 + 6 = 0 0 + y = -6.32455532 + 6 y = -6.32455532 + 6 Combine like terms: -6.32455532 + 6 = -0.32455532 y = -0.32455532 Simplifying y = -0.32455532

Solution

The solution to the problem is based on the solutions from the subproblems. y = {12.32455532, -0.32455532}

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