t=217-17t-16t^2

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Solution for t=217-17t-16t^2 equation:


Simplifying
t = 217 + -17t + -16t2

Solving
t = 217 + -17t + -16t2

Solving for variable 't'.

Reorder the terms:
-217 + t + 17t + 16t2 = 217 + -17t + -16t2 + -217 + 17t + 16t2

Combine like terms: t + 17t = 18t
-217 + 18t + 16t2 = 217 + -17t + -16t2 + -217 + 17t + 16t2

Reorder the terms:
-217 + 18t + 16t2 = 217 + -217 + -17t + 17t + -16t2 + 16t2

Combine like terms: 217 + -217 = 0
-217 + 18t + 16t2 = 0 + -17t + 17t + -16t2 + 16t2
-217 + 18t + 16t2 = -17t + 17t + -16t2 + 16t2

Combine like terms: -17t + 17t = 0
-217 + 18t + 16t2 = 0 + -16t2 + 16t2
-217 + 18t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
-217 + 18t + 16t2 = 0

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

Divide each side by '16'.
-13.5625 + 1.125t + t2 = 0

Move the constant term to the right:

Add '13.5625' to each side of the equation.
-13.5625 + 1.125t + 13.5625 + t2 = 0 + 13.5625

Reorder the terms:
-13.5625 + 13.5625 + 1.125t + t2 = 0 + 13.5625

Combine like terms: -13.5625 + 13.5625 = 0.0000
0.0000 + 1.125t + t2 = 0 + 13.5625
1.125t + t2 = 0 + 13.5625

Combine like terms: 0 + 13.5625 = 13.5625
1.125t + t2 = 13.5625

The t term is 1.125t.  Take half its coefficient (0.5625).
Square it (0.31640625) and add it to both sides.

Add '0.31640625' to each side of the equation.
1.125t + 0.31640625 + t2 = 13.5625 + 0.31640625

Reorder the terms:
0.31640625 + 1.125t + t2 = 13.5625 + 0.31640625

Combine like terms: 13.5625 + 0.31640625 = 13.87890625
0.31640625 + 1.125t + t2 = 13.87890625

Factor a perfect square on the left side:
(t + 0.5625)(t + 0.5625) = 13.87890625

Calculate the square root of the right side: 3.72544041

Break this problem into two subproblems by setting 
(t + 0.5625) equal to 3.72544041 and -3.72544041.

Subproblem 1

t + 0.5625 = 3.72544041 Simplifying t + 0.5625 = 3.72544041 Reorder the terms: 0.5625 + t = 3.72544041 Solving 0.5625 + t = 3.72544041 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.5625' to each side of the equation. 0.5625 + -0.5625 + t = 3.72544041 + -0.5625 Combine like terms: 0.5625 + -0.5625 = 0.0000 0.0000 + t = 3.72544041 + -0.5625 t = 3.72544041 + -0.5625 Combine like terms: 3.72544041 + -0.5625 = 3.16294041 t = 3.16294041 Simplifying t = 3.16294041

Subproblem 2

t + 0.5625 = -3.72544041 Simplifying t + 0.5625 = -3.72544041 Reorder the terms: 0.5625 + t = -3.72544041 Solving 0.5625 + t = -3.72544041 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.5625' to each side of the equation. 0.5625 + -0.5625 + t = -3.72544041 + -0.5625 Combine like terms: 0.5625 + -0.5625 = 0.0000 0.0000 + t = -3.72544041 + -0.5625 t = -3.72544041 + -0.5625 Combine like terms: -3.72544041 + -0.5625 = -4.28794041 t = -4.28794041 Simplifying t = -4.28794041

Solution

The solution to the problem is based on the solutions from the subproblems. t = {3.16294041, -4.28794041}

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