t^2-36t+324=85

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Solution for t^2-36t+324=85 equation:


Simplifying
t2 + -36t + 324 = 85

Reorder the terms:
324 + -36t + t2 = 85

Solving
324 + -36t + t2 = 85

Solving for variable 't'.

Reorder the terms:
324 + -85 + -36t + t2 = 85 + -85

Combine like terms: 324 + -85 = 239
239 + -36t + t2 = 85 + -85

Combine like terms: 85 + -85 = 0
239 + -36t + t2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-239' to each side of the equation.
239 + -36t + -239 + t2 = 0 + -239

Reorder the terms:
239 + -239 + -36t + t2 = 0 + -239

Combine like terms: 239 + -239 = 0
0 + -36t + t2 = 0 + -239
-36t + t2 = 0 + -239

Combine like terms: 0 + -239 = -239
-36t + t2 = -239

The t term is -36t.  Take half its coefficient (-18).
Square it (324) and add it to both sides.

Add '324' to each side of the equation.
-36t + 324 + t2 = -239 + 324

Reorder the terms:
324 + -36t + t2 = -239 + 324

Combine like terms: -239 + 324 = 85
324 + -36t + t2 = 85

Factor a perfect square on the left side:
(t + -18)(t + -18) = 85

Calculate the square root of the right side: 9.219544457

Break this problem into two subproblems by setting 
(t + -18) equal to 9.219544457 and -9.219544457.

Subproblem 1

t + -18 = 9.219544457 Simplifying t + -18 = 9.219544457 Reorder the terms: -18 + t = 9.219544457 Solving -18 + t = 9.219544457 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '18' to each side of the equation. -18 + 18 + t = 9.219544457 + 18 Combine like terms: -18 + 18 = 0 0 + t = 9.219544457 + 18 t = 9.219544457 + 18 Combine like terms: 9.219544457 + 18 = 27.219544457 t = 27.219544457 Simplifying t = 27.219544457

Subproblem 2

t + -18 = -9.219544457 Simplifying t + -18 = -9.219544457 Reorder the terms: -18 + t = -9.219544457 Solving -18 + t = -9.219544457 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '18' to each side of the equation. -18 + 18 + t = -9.219544457 + 18 Combine like terms: -18 + 18 = 0 0 + t = -9.219544457 + 18 t = -9.219544457 + 18 Combine like terms: -9.219544457 + 18 = 8.780455543 t = 8.780455543 Simplifying t = 8.780455543

Solution

The solution to the problem is based on the solutions from the subproblems. t = {27.219544457, 8.780455543}

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