0=-16t^2+65t+3.5

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Solution for 0=-16t^2+65t+3.5 equation:


Simplifying
0 = -16t2 + 65t + 3.5

Reorder the terms:
0 = 3.5 + 65t + -16t2

Solving
0 = 3.5 + 65t + -16t2

Solving for variable 't'.

Combine like terms: 0 + -3.5 = -3.5
-3.5 + -65t + 16t2 = 3.5 + 65t + -16t2 + -3.5 + -65t + 16t2

Reorder the terms:
-3.5 + -65t + 16t2 = 3.5 + -3.5 + 65t + -65t + -16t2 + 16t2

Combine like terms: 3.5 + -3.5 = 0.0
-3.5 + -65t + 16t2 = 0.0 + 65t + -65t + -16t2 + 16t2
-3.5 + -65t + 16t2 = 65t + -65t + -16t2 + 16t2

Combine like terms: 65t + -65t = 0
-3.5 + -65t + 16t2 = 0 + -16t2 + 16t2
-3.5 + -65t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
-3.5 + -65t + 16t2 = 0

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

Divide each side by '16'.
-0.21875 + -4.0625t + t2 = 0

Move the constant term to the right:

Add '0.21875' to each side of the equation.
-0.21875 + -4.0625t + 0.21875 + t2 = 0 + 0.21875

Reorder the terms:
-0.21875 + 0.21875 + -4.0625t + t2 = 0 + 0.21875

Combine like terms: -0.21875 + 0.21875 = 0.00000
0.00000 + -4.0625t + t2 = 0 + 0.21875
-4.0625t + t2 = 0 + 0.21875

Combine like terms: 0 + 0.21875 = 0.21875
-4.0625t + t2 = 0.21875

The t term is -4.0625t.  Take half its coefficient (-2.03125).
Square it (4.125976563) and add it to both sides.

Add '4.125976563' to each side of the equation.
-4.0625t + 4.125976563 + t2 = 0.21875 + 4.125976563

Reorder the terms:
4.125976563 + -4.0625t + t2 = 0.21875 + 4.125976563

Combine like terms: 0.21875 + 4.125976563 = 4.344726563
4.125976563 + -4.0625t + t2 = 4.344726563

Factor a perfect square on the left side:
(t + -2.03125)(t + -2.03125) = 4.344726563

Calculate the square root of the right side: 2.084400768

Break this problem into two subproblems by setting 
(t + -2.03125) equal to 2.084400768 and -2.084400768.

Subproblem 1

t + -2.03125 = 2.084400768 Simplifying t + -2.03125 = 2.084400768 Reorder the terms: -2.03125 + t = 2.084400768 Solving -2.03125 + t = 2.084400768 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.03125' to each side of the equation. -2.03125 + 2.03125 + t = 2.084400768 + 2.03125 Combine like terms: -2.03125 + 2.03125 = 0.00000 0.00000 + t = 2.084400768 + 2.03125 t = 2.084400768 + 2.03125 Combine like terms: 2.084400768 + 2.03125 = 4.115650768 t = 4.115650768 Simplifying t = 4.115650768

Subproblem 2

t + -2.03125 = -2.084400768 Simplifying t + -2.03125 = -2.084400768 Reorder the terms: -2.03125 + t = -2.084400768 Solving -2.03125 + t = -2.084400768 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.03125' to each side of the equation. -2.03125 + 2.03125 + t = -2.084400768 + 2.03125 Combine like terms: -2.03125 + 2.03125 = 0.00000 0.00000 + t = -2.084400768 + 2.03125 t = -2.084400768 + 2.03125 Combine like terms: -2.084400768 + 2.03125 = -0.053150768 t = -0.053150768 Simplifying t = -0.053150768

Solution

The solution to the problem is based on the solutions from the subproblems. t = {4.115650768, -0.053150768}

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