0=4.9t^2-16t-3

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Solution for 0=4.9t^2-16t-3 equation:


Simplifying
0 = 4.9t2 + -16t + -3

Reorder the terms:
0 = -3 + -16t + 4.9t2

Solving
0 = -3 + -16t + 4.9t2

Solving for variable 't'.

Combine like terms: 0 + 3 = 3
3 + 16t + -4.9t2 = -3 + -16t + 4.9t2 + 3 + 16t + -4.9t2

Reorder the terms:
3 + 16t + -4.9t2 = -3 + 3 + -16t + 16t + 4.9t2 + -4.9t2

Combine like terms: -3 + 3 = 0
3 + 16t + -4.9t2 = 0 + -16t + 16t + 4.9t2 + -4.9t2
3 + 16t + -4.9t2 = -16t + 16t + 4.9t2 + -4.9t2

Combine like terms: -16t + 16t = 0
3 + 16t + -4.9t2 = 0 + 4.9t2 + -4.9t2
3 + 16t + -4.9t2 = 4.9t2 + -4.9t2

Combine like terms: 4.9t2 + -4.9t2 = 0.0
3 + 16t + -4.9t2 = 0.0

Begin completing the square.  Divide all terms by
-4.9 the coefficient of the squared term: 

Divide each side by '-4.9'.
-0.612244898 + -3.265306122t + t2 = 0

Move the constant term to the right:

Add '0.612244898' to each side of the equation.
-0.612244898 + -3.265306122t + 0.612244898 + t2 = 0 + 0.612244898

Reorder the terms:
-0.612244898 + 0.612244898 + -3.265306122t + t2 = 0 + 0.612244898

Combine like terms: -0.612244898 + 0.612244898 = 0.000000000
0.000000000 + -3.265306122t + t2 = 0 + 0.612244898
-3.265306122t + t2 = 0 + 0.612244898

Combine like terms: 0 + 0.612244898 = 0.612244898
-3.265306122t + t2 = 0.612244898

The t term is -3.265306122t.  Take half its coefficient (-1.632653061).
Square it (2.665556018) and add it to both sides.

Add '2.665556018' to each side of the equation.
-3.265306122t + 2.665556018 + t2 = 0.612244898 + 2.665556018

Reorder the terms:
2.665556018 + -3.265306122t + t2 = 0.612244898 + 2.665556018

Combine like terms: 0.612244898 + 2.665556018 = 3.277800916
2.665556018 + -3.265306122t + t2 = 3.277800916

Factor a perfect square on the left side:
(t + -1.632653061)(t + -1.632653061) = 3.277800916

Calculate the square root of the right side: 1.810469805

Break this problem into two subproblems by setting 
(t + -1.632653061) equal to 1.810469805 and -1.810469805.

Subproblem 1

t + -1.632653061 = 1.810469805 Simplifying t + -1.632653061 = 1.810469805 Reorder the terms: -1.632653061 + t = 1.810469805 Solving -1.632653061 + t = 1.810469805 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.632653061' to each side of the equation. -1.632653061 + 1.632653061 + t = 1.810469805 + 1.632653061 Combine like terms: -1.632653061 + 1.632653061 = 0.000000000 0.000000000 + t = 1.810469805 + 1.632653061 t = 1.810469805 + 1.632653061 Combine like terms: 1.810469805 + 1.632653061 = 3.443122866 t = 3.443122866 Simplifying t = 3.443122866

Subproblem 2

t + -1.632653061 = -1.810469805 Simplifying t + -1.632653061 = -1.810469805 Reorder the terms: -1.632653061 + t = -1.810469805 Solving -1.632653061 + t = -1.810469805 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.632653061' to each side of the equation. -1.632653061 + 1.632653061 + t = -1.810469805 + 1.632653061 Combine like terms: -1.632653061 + 1.632653061 = 0.000000000 0.000000000 + t = -1.810469805 + 1.632653061 t = -1.810469805 + 1.632653061 Combine like terms: -1.810469805 + 1.632653061 = -0.177816744 t = -0.177816744 Simplifying t = -0.177816744

Solution

The solution to the problem is based on the solutions from the subproblems. t = {3.443122866, -0.177816744}

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