11t^2-9t-819=0

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Solution for 11t^2-9t-819=0 equation:


Simplifying
11t2 + -9t + -819 = 0

Reorder the terms:
-819 + -9t + 11t2 = 0

Solving
-819 + -9t + 11t2 = 0

Solving for variable 't'.

Begin completing the square.  Divide all terms by
11 the coefficient of the squared term: 

Divide each side by '11'.
-74.45454545 + -0.8181818182t + t2 = 0

Move the constant term to the right:

Add '74.45454545' to each side of the equation.
-74.45454545 + -0.8181818182t + 74.45454545 + t2 = 0 + 74.45454545

Reorder the terms:
-74.45454545 + 74.45454545 + -0.8181818182t + t2 = 0 + 74.45454545

Combine like terms: -74.45454545 + 74.45454545 = 0.00000000
0.00000000 + -0.8181818182t + t2 = 0 + 74.45454545
-0.8181818182t + t2 = 0 + 74.45454545

Combine like terms: 0 + 74.45454545 = 74.45454545
-0.8181818182t + t2 = 74.45454545

The t term is -0.8181818182t.  Take half its coefficient (-0.4090909091).
Square it (0.1673553719) and add it to both sides.

Add '0.1673553719' to each side of the equation.
-0.8181818182t + 0.1673553719 + t2 = 74.45454545 + 0.1673553719

Reorder the terms:
0.1673553719 + -0.8181818182t + t2 = 74.45454545 + 0.1673553719

Combine like terms: 74.45454545 + 0.1673553719 = 74.6219008219
0.1673553719 + -0.8181818182t + t2 = 74.6219008219

Factor a perfect square on the left side:
(t + -0.4090909091)(t + -0.4090909091) = 74.6219008219

Calculate the square root of the right side: 8.63839689

Break this problem into two subproblems by setting 
(t + -0.4090909091) equal to 8.63839689 and -8.63839689.

Subproblem 1

t + -0.4090909091 = 8.63839689 Simplifying t + -0.4090909091 = 8.63839689 Reorder the terms: -0.4090909091 + t = 8.63839689 Solving -0.4090909091 + t = 8.63839689 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.4090909091' to each side of the equation. -0.4090909091 + 0.4090909091 + t = 8.63839689 + 0.4090909091 Combine like terms: -0.4090909091 + 0.4090909091 = 0.0000000000 0.0000000000 + t = 8.63839689 + 0.4090909091 t = 8.63839689 + 0.4090909091 Combine like terms: 8.63839689 + 0.4090909091 = 9.0474877991 t = 9.0474877991 Simplifying t = 9.0474877991

Subproblem 2

t + -0.4090909091 = -8.63839689 Simplifying t + -0.4090909091 = -8.63839689 Reorder the terms: -0.4090909091 + t = -8.63839689 Solving -0.4090909091 + t = -8.63839689 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.4090909091' to each side of the equation. -0.4090909091 + 0.4090909091 + t = -8.63839689 + 0.4090909091 Combine like terms: -0.4090909091 + 0.4090909091 = 0.0000000000 0.0000000000 + t = -8.63839689 + 0.4090909091 t = -8.63839689 + 0.4090909091 Combine like terms: -8.63839689 + 0.4090909091 = -8.2293059809 t = -8.2293059809 Simplifying t = -8.2293059809

Solution

The solution to the problem is based on the solutions from the subproblems. t = {9.0474877991, -8.2293059809}

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