u^2-12u-36=0

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Solution for u^2-12u-36=0 equation:


Simplifying
u2 + -12u + -36 = 0

Reorder the terms:
-36 + -12u + u2 = 0

Solving
-36 + -12u + u2 = 0

Solving for variable 'u'.

Begin completing the square.

Move the constant term to the right:

Add '36' to each side of the equation.
-36 + -12u + 36 + u2 = 0 + 36

Reorder the terms:
-36 + 36 + -12u + u2 = 0 + 36

Combine like terms: -36 + 36 = 0
0 + -12u + u2 = 0 + 36
-12u + u2 = 0 + 36

Combine like terms: 0 + 36 = 36
-12u + u2 = 36

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

Add '36' to each side of the equation.
-12u + 36 + u2 = 36 + 36

Reorder the terms:
36 + -12u + u2 = 36 + 36

Combine like terms: 36 + 36 = 72
36 + -12u + u2 = 72

Factor a perfect square on the left side:
(u + -6)(u + -6) = 72

Calculate the square root of the right side: 8.485281374

Break this problem into two subproblems by setting 
(u + -6) equal to 8.485281374 and -8.485281374.

Subproblem 1

u + -6 = 8.485281374 Simplifying u + -6 = 8.485281374 Reorder the terms: -6 + u = 8.485281374 Solving -6 + u = 8.485281374 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + u = 8.485281374 + 6 Combine like terms: -6 + 6 = 0 0 + u = 8.485281374 + 6 u = 8.485281374 + 6 Combine like terms: 8.485281374 + 6 = 14.485281374 u = 14.485281374 Simplifying u = 14.485281374

Subproblem 2

u + -6 = -8.485281374 Simplifying u + -6 = -8.485281374 Reorder the terms: -6 + u = -8.485281374 Solving -6 + u = -8.485281374 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + u = -8.485281374 + 6 Combine like terms: -6 + 6 = 0 0 + u = -8.485281374 + 6 u = -8.485281374 + 6 Combine like terms: -8.485281374 + 6 = -2.485281374 u = -2.485281374 Simplifying u = -2.485281374

Solution

The solution to the problem is based on the solutions from the subproblems. u = {14.485281374, -2.485281374}

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