0=-.16t^2+5t-17

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Solution for 0=-.16t^2+5t-17 equation:


Simplifying
0 = -0.16t2 + 5t + -17

Reorder the terms:
0 = -17 + 5t + -0.16t2

Solving
0 = -17 + 5t + -0.16t2

Solving for variable 't'.

Combine like terms: 0 + 17 = 17
17 + -5t + 0.16t2 = -17 + 5t + -0.16t2 + 17 + -5t + 0.16t2

Reorder the terms:
17 + -5t + 0.16t2 = -17 + 17 + 5t + -5t + -0.16t2 + 0.16t2

Combine like terms: -17 + 17 = 0
17 + -5t + 0.16t2 = 0 + 5t + -5t + -0.16t2 + 0.16t2
17 + -5t + 0.16t2 = 5t + -5t + -0.16t2 + 0.16t2

Combine like terms: 5t + -5t = 0
17 + -5t + 0.16t2 = 0 + -0.16t2 + 0.16t2
17 + -5t + 0.16t2 = -0.16t2 + 0.16t2

Combine like terms: -0.16t2 + 0.16t2 = 0.00
17 + -5t + 0.16t2 = 0.00

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

Divide each side by '0.16'.
106.25 + -31.25t + t2 = 0

Move the constant term to the right:

Add '-106.25' to each side of the equation.
106.25 + -31.25t + -106.25 + t2 = 0 + -106.25

Reorder the terms:
106.25 + -106.25 + -31.25t + t2 = 0 + -106.25

Combine like terms: 106.25 + -106.25 = 0.00
0.00 + -31.25t + t2 = 0 + -106.25
-31.25t + t2 = 0 + -106.25

Combine like terms: 0 + -106.25 = -106.25
-31.25t + t2 = -106.25

The t term is -31.25t.  Take half its coefficient (-15.625).
Square it (244.140625) and add it to both sides.

Add '244.140625' to each side of the equation.
-31.25t + 244.140625 + t2 = -106.25 + 244.140625

Reorder the terms:
244.140625 + -31.25t + t2 = -106.25 + 244.140625

Combine like terms: -106.25 + 244.140625 = 137.890625
244.140625 + -31.25t + t2 = 137.890625

Factor a perfect square on the left side:
(t + -15.625)(t + -15.625) = 137.890625

Calculate the square root of the right side: 11.742683893

Break this problem into two subproblems by setting 
(t + -15.625) equal to 11.742683893 and -11.742683893.

Subproblem 1

t + -15.625 = 11.742683893 Simplifying t + -15.625 = 11.742683893 Reorder the terms: -15.625 + t = 11.742683893 Solving -15.625 + t = 11.742683893 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '15.625' to each side of the equation. -15.625 + 15.625 + t = 11.742683893 + 15.625 Combine like terms: -15.625 + 15.625 = 0.000 0.000 + t = 11.742683893 + 15.625 t = 11.742683893 + 15.625 Combine like terms: 11.742683893 + 15.625 = 27.367683893 t = 27.367683893 Simplifying t = 27.367683893

Subproblem 2

t + -15.625 = -11.742683893 Simplifying t + -15.625 = -11.742683893 Reorder the terms: -15.625 + t = -11.742683893 Solving -15.625 + t = -11.742683893 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '15.625' to each side of the equation. -15.625 + 15.625 + t = -11.742683893 + 15.625 Combine like terms: -15.625 + 15.625 = 0.000 0.000 + t = -11.742683893 + 15.625 t = -11.742683893 + 15.625 Combine like terms: -11.742683893 + 15.625 = 3.882316107 t = 3.882316107 Simplifying t = 3.882316107

Solution

The solution to the problem is based on the solutions from the subproblems. t = {27.367683893, 3.882316107}

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