5=-16t^2+20t+6

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Solution for 5=-16t^2+20t+6 equation:


Simplifying
5 = -16t2 + 20t + 6

Reorder the terms:
5 = 6 + 20t + -16t2

Solving
5 = 6 + 20t + -16t2

Solving for variable 't'.

Combine like terms: 5 + -6 = -1
-1 + -20t + 16t2 = 6 + 20t + -16t2 + -6 + -20t + 16t2

Reorder the terms:
-1 + -20t + 16t2 = 6 + -6 + 20t + -20t + -16t2 + 16t2

Combine like terms: 6 + -6 = 0
-1 + -20t + 16t2 = 0 + 20t + -20t + -16t2 + 16t2
-1 + -20t + 16t2 = 20t + -20t + -16t2 + 16t2

Combine like terms: 20t + -20t = 0
-1 + -20t + 16t2 = 0 + -16t2 + 16t2
-1 + -20t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
-1 + -20t + 16t2 = 0

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

Divide each side by '16'.
-0.0625 + -1.25t + t2 = 0

Move the constant term to the right:

Add '0.0625' to each side of the equation.
-0.0625 + -1.25t + 0.0625 + t2 = 0 + 0.0625

Reorder the terms:
-0.0625 + 0.0625 + -1.25t + t2 = 0 + 0.0625

Combine like terms: -0.0625 + 0.0625 = 0.0000
0.0000 + -1.25t + t2 = 0 + 0.0625
-1.25t + t2 = 0 + 0.0625

Combine like terms: 0 + 0.0625 = 0.0625
-1.25t + t2 = 0.0625

The t term is -1.25t.  Take half its coefficient (-0.625).
Square it (0.390625) and add it to both sides.

Add '0.390625' to each side of the equation.
-1.25t + 0.390625 + t2 = 0.0625 + 0.390625

Reorder the terms:
0.390625 + -1.25t + t2 = 0.0625 + 0.390625

Combine like terms: 0.0625 + 0.390625 = 0.453125
0.390625 + -1.25t + t2 = 0.453125

Factor a perfect square on the left side:
(t + -0.625)(t + -0.625) = 0.453125

Calculate the square root of the right side: 0.673145601

Break this problem into two subproblems by setting 
(t + -0.625) equal to 0.673145601 and -0.673145601.

Subproblem 1

t + -0.625 = 0.673145601 Simplifying t + -0.625 = 0.673145601 Reorder the terms: -0.625 + t = 0.673145601 Solving -0.625 + t = 0.673145601 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.625' to each side of the equation. -0.625 + 0.625 + t = 0.673145601 + 0.625 Combine like terms: -0.625 + 0.625 = 0.000 0.000 + t = 0.673145601 + 0.625 t = 0.673145601 + 0.625 Combine like terms: 0.673145601 + 0.625 = 1.298145601 t = 1.298145601 Simplifying t = 1.298145601

Subproblem 2

t + -0.625 = -0.673145601 Simplifying t + -0.625 = -0.673145601 Reorder the terms: -0.625 + t = -0.673145601 Solving -0.625 + t = -0.673145601 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.625' to each side of the equation. -0.625 + 0.625 + t = -0.673145601 + 0.625 Combine like terms: -0.625 + 0.625 = 0.000 0.000 + t = -0.673145601 + 0.625 t = -0.673145601 + 0.625 Combine like terms: -0.673145601 + 0.625 = -0.048145601 t = -0.048145601 Simplifying t = -0.048145601

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.298145601, -0.048145601}

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