-16t^2+45t+200=0

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Solution for -16t^2+45t+200=0 equation:


Simplifying
-16t2 + 45t + 200 = 0

Reorder the terms:
200 + 45t + -16t2 = 0

Solving
200 + 45t + -16t2 = 0

Solving for variable 't'.

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

Divide each side by '-16'.
-12.5 + -2.8125t + t2 = 0

Move the constant term to the right:

Add '12.5' to each side of the equation.
-12.5 + -2.8125t + 12.5 + t2 = 0 + 12.5

Reorder the terms:
-12.5 + 12.5 + -2.8125t + t2 = 0 + 12.5

Combine like terms: -12.5 + 12.5 = 0.0
0.0 + -2.8125t + t2 = 0 + 12.5
-2.8125t + t2 = 0 + 12.5

Combine like terms: 0 + 12.5 = 12.5
-2.8125t + t2 = 12.5

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 = 12.5 + 1.977539063

Reorder the terms:
1.977539063 + -2.8125t + t2 = 12.5 + 1.977539063

Combine like terms: 12.5 + 1.977539063 = 14.477539063
1.977539063 + -2.8125t + t2 = 14.477539063

Factor a perfect square on the left side:
(t + -1.40625)(t + -1.40625) = 14.477539063

Calculate the square root of the right side: 3.804936144

Break this problem into two subproblems by setting 
(t + -1.40625) equal to 3.804936144 and -3.804936144.

Subproblem 1

t + -1.40625 = 3.804936144 Simplifying t + -1.40625 = 3.804936144 Reorder the terms: -1.40625 + t = 3.804936144 Solving -1.40625 + t = 3.804936144 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 = 3.804936144 + 1.40625 Combine like terms: -1.40625 + 1.40625 = 0.00000 0.00000 + t = 3.804936144 + 1.40625 t = 3.804936144 + 1.40625 Combine like terms: 3.804936144 + 1.40625 = 5.211186144 t = 5.211186144 Simplifying t = 5.211186144

Subproblem 2

t + -1.40625 = -3.804936144 Simplifying t + -1.40625 = -3.804936144 Reorder the terms: -1.40625 + t = -3.804936144 Solving -1.40625 + t = -3.804936144 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 = -3.804936144 + 1.40625 Combine like terms: -1.40625 + 1.40625 = 0.00000 0.00000 + t = -3.804936144 + 1.40625 t = -3.804936144 + 1.40625 Combine like terms: -3.804936144 + 1.40625 = -2.398686144 t = -2.398686144 Simplifying t = -2.398686144

Solution

The solution to the problem is based on the solutions from the subproblems. t = {5.211186144, -2.398686144}

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