y^2-12y-63=0

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Solution for y^2-12y-63=0 equation:


Simplifying
y2 + -12y + -63 = 0

Reorder the terms:
-63 + -12y + y2 = 0

Solving
-63 + -12y + y2 = 0

Solving for variable 'y'.

Begin completing the square.

Move the constant term to the right:

Add '63' to each side of the equation.
-63 + -12y + 63 + y2 = 0 + 63

Reorder the terms:
-63 + 63 + -12y + y2 = 0 + 63

Combine like terms: -63 + 63 = 0
0 + -12y + y2 = 0 + 63
-12y + y2 = 0 + 63

Combine like terms: 0 + 63 = 63
-12y + y2 = 63

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 = 63 + 36

Reorder the terms:
36 + -12y + y2 = 63 + 36

Combine like terms: 63 + 36 = 99
36 + -12y + y2 = 99

Factor a perfect square on the left side:
(y + -6)(y + -6) = 99

Calculate the square root of the right side: 9.949874371

Break this problem into two subproblems by setting 
(y + -6) equal to 9.949874371 and -9.949874371.

Subproblem 1

y + -6 = 9.949874371 Simplifying y + -6 = 9.949874371 Reorder the terms: -6 + y = 9.949874371 Solving -6 + y = 9.949874371 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 = 9.949874371 + 6 Combine like terms: -6 + 6 = 0 0 + y = 9.949874371 + 6 y = 9.949874371 + 6 Combine like terms: 9.949874371 + 6 = 15.949874371 y = 15.949874371 Simplifying y = 15.949874371

Subproblem 2

y + -6 = -9.949874371 Simplifying y + -6 = -9.949874371 Reorder the terms: -6 + y = -9.949874371 Solving -6 + y = -9.949874371 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 = -9.949874371 + 6 Combine like terms: -6 + 6 = 0 0 + y = -9.949874371 + 6 y = -9.949874371 + 6 Combine like terms: -9.949874371 + 6 = -3.949874371 y = -3.949874371 Simplifying y = -3.949874371

Solution

The solution to the problem is based on the solutions from the subproblems. y = {15.949874371, -3.949874371}

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