9t^2-54t-17=0

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Solution for 9t^2-54t-17=0 equation:


Simplifying
9t2 + -54t + -17 = 0

Reorder the terms:
-17 + -54t + 9t2 = 0

Solving
-17 + -54t + 9t2 = 0

Solving for variable 't'.

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

Divide each side by '9'.
-1.888888889 + -6t + t2 = 0

Move the constant term to the right:

Add '1.888888889' to each side of the equation.
-1.888888889 + -6t + 1.888888889 + t2 = 0 + 1.888888889

Reorder the terms:
-1.888888889 + 1.888888889 + -6t + t2 = 0 + 1.888888889

Combine like terms: -1.888888889 + 1.888888889 = 0.000000000
0.000000000 + -6t + t2 = 0 + 1.888888889
-6t + t2 = 0 + 1.888888889

Combine like terms: 0 + 1.888888889 = 1.888888889
-6t + t2 = 1.888888889

The t term is -6t.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6t + 9 + t2 = 1.888888889 + 9

Reorder the terms:
9 + -6t + t2 = 1.888888889 + 9

Combine like terms: 1.888888889 + 9 = 10.888888889
9 + -6t + t2 = 10.888888889

Factor a perfect square on the left side:
(t + -3)(t + -3) = 10.888888889

Calculate the square root of the right side: 3.299831646

Break this problem into two subproblems by setting 
(t + -3) equal to 3.299831646 and -3.299831646.

Subproblem 1

t + -3 = 3.299831646 Simplifying t + -3 = 3.299831646 Reorder the terms: -3 + t = 3.299831646 Solving -3 + t = 3.299831646 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + t = 3.299831646 + 3 Combine like terms: -3 + 3 = 0 0 + t = 3.299831646 + 3 t = 3.299831646 + 3 Combine like terms: 3.299831646 + 3 = 6.299831646 t = 6.299831646 Simplifying t = 6.299831646

Subproblem 2

t + -3 = -3.299831646 Simplifying t + -3 = -3.299831646 Reorder the terms: -3 + t = -3.299831646 Solving -3 + t = -3.299831646 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + t = -3.299831646 + 3 Combine like terms: -3 + 3 = 0 0 + t = -3.299831646 + 3 t = -3.299831646 + 3 Combine like terms: -3.299831646 + 3 = -0.299831646 t = -0.299831646 Simplifying t = -0.299831646

Solution

The solution to the problem is based on the solutions from the subproblems. t = {6.299831646, -0.299831646}

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