5.5=-16t^2+45t+2.5

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Solution for 5.5=-16t^2+45t+2.5 equation:


Simplifying
5.5 = -16t2 + 45t + 2.5

Reorder the terms:
5.5 = 2.5 + 45t + -16t2

Solving
5.5 = 2.5 + 45t + -16t2

Solving for variable 't'.

Combine like terms: 5.5 + -2.5 = 3
3 + -45t + 16t2 = 2.5 + 45t + -16t2 + -2.5 + -45t + 16t2

Reorder the terms:
3 + -45t + 16t2 = 2.5 + -2.5 + 45t + -45t + -16t2 + 16t2

Combine like terms: 2.5 + -2.5 = 0.0
3 + -45t + 16t2 = 0.0 + 45t + -45t + -16t2 + 16t2
3 + -45t + 16t2 = 45t + -45t + -16t2 + 16t2

Combine like terms: 45t + -45t = 0
3 + -45t + 16t2 = 0 + -16t2 + 16t2
3 + -45t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
3 + -45t + 16t2 = 0

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

Divide each side by '16'.
0.1875 + -2.8125t + t2 = 0

Move the constant term to the right:

Add '-0.1875' to each side of the equation.
0.1875 + -2.8125t + -0.1875 + t2 = 0 + -0.1875

Reorder the terms:
0.1875 + -0.1875 + -2.8125t + t2 = 0 + -0.1875

Combine like terms: 0.1875 + -0.1875 = 0.0000
0.0000 + -2.8125t + t2 = 0 + -0.1875
-2.8125t + t2 = 0 + -0.1875

Combine like terms: 0 + -0.1875 = -0.1875
-2.8125t + t2 = -0.1875

The t term is -2.8125t.  Take half its coefficient (-1.40625).
Square it (1.977539063) and add it to both sides.

Add '1.977539063' to each side of the equation.
-2.8125t + 1.977539063 + t2 = -0.1875 + 1.977539063

Reorder the terms:
1.977539063 + -2.8125t + t2 = -0.1875 + 1.977539063

Combine like terms: -0.1875 + 1.977539063 = 1.790039063
1.977539063 + -2.8125t + t2 = 1.790039063

Factor a perfect square on the left side:
(t + -1.40625)(t + -1.40625) = 1.790039063

Calculate the square root of the right side: 1.337923414

Break this problem into two subproblems by setting 
(t + -1.40625) equal to 1.337923414 and -1.337923414.

Subproblem 1

t + -1.40625 = 1.337923414 Simplifying t + -1.40625 = 1.337923414 Reorder the terms: -1.40625 + t = 1.337923414 Solving -1.40625 + t = 1.337923414 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.40625' to each side of the equation. -1.40625 + 1.40625 + t = 1.337923414 + 1.40625 Combine like terms: -1.40625 + 1.40625 = 0.00000 0.00000 + t = 1.337923414 + 1.40625 t = 1.337923414 + 1.40625 Combine like terms: 1.337923414 + 1.40625 = 2.744173414 t = 2.744173414 Simplifying t = 2.744173414

Subproblem 2

t + -1.40625 = -1.337923414 Simplifying t + -1.40625 = -1.337923414 Reorder the terms: -1.40625 + t = -1.337923414 Solving -1.40625 + t = -1.337923414 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.40625' to each side of the equation. -1.40625 + 1.40625 + t = -1.337923414 + 1.40625 Combine like terms: -1.40625 + 1.40625 = 0.00000 0.00000 + t = -1.337923414 + 1.40625 t = -1.337923414 + 1.40625 Combine like terms: -1.337923414 + 1.40625 = 0.068326586 t = 0.068326586 Simplifying t = 0.068326586

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.744173414, 0.068326586}

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