y^2-6y-36=

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Solution for y^2-6y-36= equation:


Simplifying
y2 + -6y + -36 = 0

Reorder the terms:
-36 + -6y + y2 = 0

Solving
-36 + -6y + y2 = 0

Solving for variable 'y'.

Begin completing the square.

Move the constant term to the right:

Add '36' to each side of the equation.
-36 + -6y + 36 + y2 = 0 + 36

Reorder the terms:
-36 + 36 + -6y + y2 = 0 + 36

Combine like terms: -36 + 36 = 0
0 + -6y + y2 = 0 + 36
-6y + y2 = 0 + 36

Combine like terms: 0 + 36 = 36
-6y + y2 = 36

The y term is -6y.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6y + 9 + y2 = 36 + 9

Reorder the terms:
9 + -6y + y2 = 36 + 9

Combine like terms: 36 + 9 = 45
9 + -6y + y2 = 45

Factor a perfect square on the left side:
(y + -3)(y + -3) = 45

Calculate the square root of the right side: 6.708203933

Break this problem into two subproblems by setting 
(y + -3) equal to 6.708203933 and -6.708203933.

Subproblem 1

y + -3 = 6.708203933 Simplifying y + -3 = 6.708203933 Reorder the terms: -3 + y = 6.708203933 Solving -3 + y = 6.708203933 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + y = 6.708203933 + 3 Combine like terms: -3 + 3 = 0 0 + y = 6.708203933 + 3 y = 6.708203933 + 3 Combine like terms: 6.708203933 + 3 = 9.708203933 y = 9.708203933 Simplifying y = 9.708203933

Subproblem 2

y + -3 = -6.708203933 Simplifying y + -3 = -6.708203933 Reorder the terms: -3 + y = -6.708203933 Solving -3 + y = -6.708203933 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + y = -6.708203933 + 3 Combine like terms: -3 + 3 = 0 0 + y = -6.708203933 + 3 y = -6.708203933 + 3 Combine like terms: -6.708203933 + 3 = -3.708203933 y = -3.708203933 Simplifying y = -3.708203933

Solution

The solution to the problem is based on the solutions from the subproblems. y = {9.708203933, -3.708203933}

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