13t^2-100t-180=0

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Solution for 13t^2-100t-180=0 equation:


Simplifying
13t2 + -100t + -180 = 0

Reorder the terms:
-180 + -100t + 13t2 = 0

Solving
-180 + -100t + 13t2 = 0

Solving for variable 't'.

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

Divide each side by '13'.
-13.84615385 + -7.692307692t + t2 = 0

Move the constant term to the right:

Add '13.84615385' to each side of the equation.
-13.84615385 + -7.692307692t + 13.84615385 + t2 = 0 + 13.84615385

Reorder the terms:
-13.84615385 + 13.84615385 + -7.692307692t + t2 = 0 + 13.84615385

Combine like terms: -13.84615385 + 13.84615385 = 0.00000000
0.00000000 + -7.692307692t + t2 = 0 + 13.84615385
-7.692307692t + t2 = 0 + 13.84615385

Combine like terms: 0 + 13.84615385 = 13.84615385
-7.692307692t + t2 = 13.84615385

The t term is -7.692307692t.  Take half its coefficient (-3.846153846).
Square it (14.79289941) and add it to both sides.

Add '14.79289941' to each side of the equation.
-7.692307692t + 14.79289941 + t2 = 13.84615385 + 14.79289941

Reorder the terms:
14.79289941 + -7.692307692t + t2 = 13.84615385 + 14.79289941

Combine like terms: 13.84615385 + 14.79289941 = 28.63905326
14.79289941 + -7.692307692t + t2 = 28.63905326

Factor a perfect square on the left side:
(t + -3.846153846)(t + -3.846153846) = 28.63905326

Calculate the square root of the right side: 5.35154681

Break this problem into two subproblems by setting 
(t + -3.846153846) equal to 5.35154681 and -5.35154681.

Subproblem 1

t + -3.846153846 = 5.35154681 Simplifying t + -3.846153846 = 5.35154681 Reorder the terms: -3.846153846 + t = 5.35154681 Solving -3.846153846 + t = 5.35154681 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.846153846' to each side of the equation. -3.846153846 + 3.846153846 + t = 5.35154681 + 3.846153846 Combine like terms: -3.846153846 + 3.846153846 = 0.000000000 0.000000000 + t = 5.35154681 + 3.846153846 t = 5.35154681 + 3.846153846 Combine like terms: 5.35154681 + 3.846153846 = 9.197700656 t = 9.197700656 Simplifying t = 9.197700656

Subproblem 2

t + -3.846153846 = -5.35154681 Simplifying t + -3.846153846 = -5.35154681 Reorder the terms: -3.846153846 + t = -5.35154681 Solving -3.846153846 + t = -5.35154681 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.846153846' to each side of the equation. -3.846153846 + 3.846153846 + t = -5.35154681 + 3.846153846 Combine like terms: -3.846153846 + 3.846153846 = 0.000000000 0.000000000 + t = -5.35154681 + 3.846153846 t = -5.35154681 + 3.846153846 Combine like terms: -5.35154681 + 3.846153846 = -1.505392964 t = -1.505392964 Simplifying t = -1.505392964

Solution

The solution to the problem is based on the solutions from the subproblems. t = {9.197700656, -1.505392964}

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