0=(-16t^2)+(40t)+5

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Solution for 0=(-16t^2)+(40t)+5 equation:


Simplifying
0 = (-16t2) + (40t) + 5

Reorder the terms:
0 = 5 + (40t) + (-16t2)

Solving
0 = 5 + (40t) + (-16t2)

Solving for variable 't'.

Combine like terms: 0 + -5 = -5
-5 + (-40t) + (16t2) = 5 + (40t) + (-16t2) + -5 + (-40t) + (16t2)

Reorder the terms:
-5 + (-40t) + (16t2) = 5 + -5 + (40t) + (-40t) + (-16t2) + (16t2)

Combine like terms: 5 + -5 = 0
-5 + (-40t) + (16t2) = 0 + (40t) + (-40t) + (-16t2) + (16t2)
-5 + (-40t) + (16t2) = (40t) + (-40t) + (-16t2) + (16t2)

Combine like terms: (40t) + (-40t) = 0
-5 + (-40t) + (16t2) = 0 + (-16t2) + (16t2)
-5 + (-40t) + (16t2) = (-16t2) + (16t2)

Combine like terms: (-16t2) + (16t2) = 0
-5 + (-40t) + (16t2) = 0

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

Divide each side by '16'.
-0.3125 + (-2.5t) + t2 = 0

Move the constant term to the right:

Add '0.3125' to each side of the equation.
-0.3125 + (-2.5t) + 0.3125 + t2 = 0 + 0.3125

Reorder the terms:
-0.3125 + 0.3125 + (-2.5t) + t2 = 0 + 0.3125

Combine like terms: -0.3125 + 0.3125 = 0.0000
0.0000 + (-2.5t) + t2 = 0 + 0.3125
(-2.5t) + t2 = 0 + 0.3125

Combine like terms: 0 + 0.3125 = 0.3125
(-2.5t) + t2 = 0.3125

The t term is (-2.5t).  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
(-2.5t) + 1.5625 + t2 = 0.3125 + 1.5625

Reorder the terms:
1.5625 + (-2.5t) + t2 = 0.3125 + 1.5625

Combine like terms: 0.3125 + 1.5625 = 1.875
1.5625 + (-2.5t) + t2 = 1.875

Factor a perfect square on the left side:
((t) + -1.25)((t) + -1.25) = 1.875

Calculate the square root of the right side: 1.369306394

Break this problem into two subproblems by setting 
((t) + -1.25) equal to 1.369306394 and -1.369306394.

Subproblem 1

(t) + -1.25 = 1.369306394 Simplifying (t) + -1.25 = 1.369306394 t + -1.25 = 1.369306394 Reorder the terms: -1.25 + t = 1.369306394 Solving -1.25 + t = 1.369306394 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + t = 1.369306394 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + t = 1.369306394 + 1.25 t = 1.369306394 + 1.25 Combine like terms: 1.369306394 + 1.25 = 2.619306394 t = 2.619306394 Simplifying t = 2.619306394

Subproblem 2

(t) + -1.25 = -1.369306394 Simplifying (t) + -1.25 = -1.369306394 t + -1.25 = -1.369306394 Reorder the terms: -1.25 + t = -1.369306394 Solving -1.25 + t = -1.369306394 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + t = -1.369306394 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + t = -1.369306394 + 1.25 t = -1.369306394 + 1.25 Combine like terms: -1.369306394 + 1.25 = -0.119306394 t = -0.119306394 Simplifying t = -0.119306394

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.619306394, -0.119306394}

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