t^2+12t=36

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Solution for t^2+12t=36 equation:


Simplifying
t2 + 12t = 36

Reorder the terms:
12t + t2 = 36

Solving
12t + t2 = 36

Solving for variable 't'.

Reorder the terms:
-36 + 12t + t2 = 36 + -36

Combine like terms: 36 + -36 = 0
-36 + 12t + t2 = 0

Begin completing the square.

Move the constant term to the right:

Add '36' to each side of the equation.
-36 + 12t + 36 + t2 = 0 + 36

Reorder the terms:
-36 + 36 + 12t + t2 = 0 + 36

Combine like terms: -36 + 36 = 0
0 + 12t + t2 = 0 + 36
12t + t2 = 0 + 36

Combine like terms: 0 + 36 = 36
12t + t2 = 36

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

Add '36' to each side of the equation.
12t + 36 + t2 = 36 + 36

Reorder the terms:
36 + 12t + t2 = 36 + 36

Combine like terms: 36 + 36 = 72
36 + 12t + t2 = 72

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

Calculate the square root of the right side: 8.485281374

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

Subproblem 1

t + 6 = 8.485281374 Simplifying t + 6 = 8.485281374 Reorder the terms: 6 + t = 8.485281374 Solving 6 + t = 8.485281374 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + t = 8.485281374 + -6 Combine like terms: 6 + -6 = 0 0 + t = 8.485281374 + -6 t = 8.485281374 + -6 Combine like terms: 8.485281374 + -6 = 2.485281374 t = 2.485281374 Simplifying t = 2.485281374

Subproblem 2

t + 6 = -8.485281374 Simplifying t + 6 = -8.485281374 Reorder the terms: 6 + t = -8.485281374 Solving 6 + t = -8.485281374 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + t = -8.485281374 + -6 Combine like terms: 6 + -6 = 0 0 + t = -8.485281374 + -6 t = -8.485281374 + -6 Combine like terms: -8.485281374 + -6 = -14.485281374 t = -14.485281374 Simplifying t = -14.485281374

Solution

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

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