9t^2-46t-130=0

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Solution for 9t^2-46t-130=0 equation:


Simplifying
9t2 + -46t + -130 = 0

Reorder the terms:
-130 + -46t + 9t2 = 0

Solving
-130 + -46t + 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'.
-14.44444444 + -5.111111111t + t2 = 0

Move the constant term to the right:

Add '14.44444444' to each side of the equation.
-14.44444444 + -5.111111111t + 14.44444444 + t2 = 0 + 14.44444444

Reorder the terms:
-14.44444444 + 14.44444444 + -5.111111111t + t2 = 0 + 14.44444444

Combine like terms: -14.44444444 + 14.44444444 = 0.00000000
0.00000000 + -5.111111111t + t2 = 0 + 14.44444444
-5.111111111t + t2 = 0 + 14.44444444

Combine like terms: 0 + 14.44444444 = 14.44444444
-5.111111111t + t2 = 14.44444444

The t term is -5.111111111t.  Take half its coefficient (-2.555555556).
Square it (6.530864200) and add it to both sides.

Add '6.530864200' to each side of the equation.
-5.111111111t + 6.530864200 + t2 = 14.44444444 + 6.530864200

Reorder the terms:
6.530864200 + -5.111111111t + t2 = 14.44444444 + 6.530864200

Combine like terms: 14.44444444 + 6.530864200 = 20.97530864
6.530864200 + -5.111111111t + t2 = 20.97530864

Factor a perfect square on the left side:
(t + -2.555555556)(t + -2.555555556) = 20.97530864

Calculate the square root of the right side: 4.579880854

Break this problem into two subproblems by setting 
(t + -2.555555556) equal to 4.579880854 and -4.579880854.

Subproblem 1

t + -2.555555556 = 4.579880854 Simplifying t + -2.555555556 = 4.579880854 Reorder the terms: -2.555555556 + t = 4.579880854 Solving -2.555555556 + t = 4.579880854 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.555555556' to each side of the equation. -2.555555556 + 2.555555556 + t = 4.579880854 + 2.555555556 Combine like terms: -2.555555556 + 2.555555556 = 0.000000000 0.000000000 + t = 4.579880854 + 2.555555556 t = 4.579880854 + 2.555555556 Combine like terms: 4.579880854 + 2.555555556 = 7.13543641 t = 7.13543641 Simplifying t = 7.13543641

Subproblem 2

t + -2.555555556 = -4.579880854 Simplifying t + -2.555555556 = -4.579880854 Reorder the terms: -2.555555556 + t = -4.579880854 Solving -2.555555556 + t = -4.579880854 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.555555556' to each side of the equation. -2.555555556 + 2.555555556 + t = -4.579880854 + 2.555555556 Combine like terms: -2.555555556 + 2.555555556 = 0.000000000 0.000000000 + t = -4.579880854 + 2.555555556 t = -4.579880854 + 2.555555556 Combine like terms: -4.579880854 + 2.555555556 = -2.024325298 t = -2.024325298 Simplifying t = -2.024325298

Solution

The solution to the problem is based on the solutions from the subproblems. t = {7.13543641, -2.024325298}

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