t^2-24t+81=0

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Solution for t^2-24t+81=0 equation:


Simplifying
t2 + -24t + 81 = 0

Reorder the terms:
81 + -24t + t2 = 0

Solving
81 + -24t + t2 = 0

Solving for variable 't'.

Begin completing the square.

Move the constant term to the right:

Add '-81' to each side of the equation.
81 + -24t + -81 + t2 = 0 + -81

Reorder the terms:
81 + -81 + -24t + t2 = 0 + -81

Combine like terms: 81 + -81 = 0
0 + -24t + t2 = 0 + -81
-24t + t2 = 0 + -81

Combine like terms: 0 + -81 = -81
-24t + t2 = -81

The t term is -24t.  Take half its coefficient (-12).
Square it (144) and add it to both sides.

Add '144' to each side of the equation.
-24t + 144 + t2 = -81 + 144

Reorder the terms:
144 + -24t + t2 = -81 + 144

Combine like terms: -81 + 144 = 63
144 + -24t + t2 = 63

Factor a perfect square on the left side:
(t + -12)(t + -12) = 63

Calculate the square root of the right side: 7.937253933

Break this problem into two subproblems by setting 
(t + -12) equal to 7.937253933 and -7.937253933.

Subproblem 1

t + -12 = 7.937253933 Simplifying t + -12 = 7.937253933 Reorder the terms: -12 + t = 7.937253933 Solving -12 + t = 7.937253933 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '12' to each side of the equation. -12 + 12 + t = 7.937253933 + 12 Combine like terms: -12 + 12 = 0 0 + t = 7.937253933 + 12 t = 7.937253933 + 12 Combine like terms: 7.937253933 + 12 = 19.937253933 t = 19.937253933 Simplifying t = 19.937253933

Subproblem 2

t + -12 = -7.937253933 Simplifying t + -12 = -7.937253933 Reorder the terms: -12 + t = -7.937253933 Solving -12 + t = -7.937253933 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '12' to each side of the equation. -12 + 12 + t = -7.937253933 + 12 Combine like terms: -12 + 12 = 0 0 + t = -7.937253933 + 12 t = -7.937253933 + 12 Combine like terms: -7.937253933 + 12 = 4.062746067 t = 4.062746067 Simplifying t = 4.062746067

Solution

The solution to the problem is based on the solutions from the subproblems. t = {19.937253933, 4.062746067}

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