4.9t^2-6t-6=0

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Solution for 4.9t^2-6t-6=0 equation:


Simplifying
4.9t2 + -6t + -6 = 0

Reorder the terms:
-6 + -6t + 4.9t2 = 0

Solving
-6 + -6t + 4.9t2 = 0

Solving for variable 't'.

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

Divide each side by '4.9'.
-1.224489796 + -1.224489796t + t2 = 0

Move the constant term to the right:

Add '1.224489796' to each side of the equation.
-1.224489796 + -1.224489796t + 1.224489796 + t2 = 0 + 1.224489796

Reorder the terms:
-1.224489796 + 1.224489796 + -1.224489796t + t2 = 0 + 1.224489796

Combine like terms: -1.224489796 + 1.224489796 = 0.000000000
0.000000000 + -1.224489796t + t2 = 0 + 1.224489796
-1.224489796t + t2 = 0 + 1.224489796

Combine like terms: 0 + 1.224489796 = 1.224489796
-1.224489796t + t2 = 1.224489796

The t term is -1.224489796t.  Take half its coefficient (-0.612244898).
Square it (0.3748438151) and add it to both sides.

Add '0.3748438151' to each side of the equation.
-1.224489796t + 0.3748438151 + t2 = 1.224489796 + 0.3748438151

Reorder the terms:
0.3748438151 + -1.224489796t + t2 = 1.224489796 + 0.3748438151

Combine like terms: 1.224489796 + 0.3748438151 = 1.5993336111
0.3748438151 + -1.224489796t + t2 = 1.5993336111

Factor a perfect square on the left side:
(t + -0.612244898)(t + -0.612244898) = 1.5993336111

Calculate the square root of the right side: 1.264647623

Break this problem into two subproblems by setting 
(t + -0.612244898) equal to 1.264647623 and -1.264647623.

Subproblem 1

t + -0.612244898 = 1.264647623 Simplifying t + -0.612244898 = 1.264647623 Reorder the terms: -0.612244898 + t = 1.264647623 Solving -0.612244898 + t = 1.264647623 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.612244898' to each side of the equation. -0.612244898 + 0.612244898 + t = 1.264647623 + 0.612244898 Combine like terms: -0.612244898 + 0.612244898 = 0.000000000 0.000000000 + t = 1.264647623 + 0.612244898 t = 1.264647623 + 0.612244898 Combine like terms: 1.264647623 + 0.612244898 = 1.876892521 t = 1.876892521 Simplifying t = 1.876892521

Subproblem 2

t + -0.612244898 = -1.264647623 Simplifying t + -0.612244898 = -1.264647623 Reorder the terms: -0.612244898 + t = -1.264647623 Solving -0.612244898 + t = -1.264647623 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.612244898' to each side of the equation. -0.612244898 + 0.612244898 + t = -1.264647623 + 0.612244898 Combine like terms: -0.612244898 + 0.612244898 = 0.000000000 0.000000000 + t = -1.264647623 + 0.612244898 t = -1.264647623 + 0.612244898 Combine like terms: -1.264647623 + 0.612244898 = -0.652402725 t = -0.652402725 Simplifying t = -0.652402725

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.876892521, -0.652402725}

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