0=4.9t^2-19t+11

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Solution for 0=4.9t^2-19t+11 equation:


Simplifying
0 = 4.9t2 + -19t + 11

Reorder the terms:
0 = 11 + -19t + 4.9t2

Solving
0 = 11 + -19t + 4.9t2

Solving for variable 't'.

Combine like terms: 0 + -11 = -11
-11 + 19t + -4.9t2 = 11 + -19t + 4.9t2 + -11 + 19t + -4.9t2

Reorder the terms:
-11 + 19t + -4.9t2 = 11 + -11 + -19t + 19t + 4.9t2 + -4.9t2

Combine like terms: 11 + -11 = 0
-11 + 19t + -4.9t2 = 0 + -19t + 19t + 4.9t2 + -4.9t2
-11 + 19t + -4.9t2 = -19t + 19t + 4.9t2 + -4.9t2

Combine like terms: -19t + 19t = 0
-11 + 19t + -4.9t2 = 0 + 4.9t2 + -4.9t2
-11 + 19t + -4.9t2 = 4.9t2 + -4.9t2

Combine like terms: 4.9t2 + -4.9t2 = 0.0
-11 + 19t + -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'.
2.244897959 + -3.87755102t + t2 = 0

Move the constant term to the right:

Add '-2.244897959' to each side of the equation.
2.244897959 + -3.87755102t + -2.244897959 + t2 = 0 + -2.244897959

Reorder the terms:
2.244897959 + -2.244897959 + -3.87755102t + t2 = 0 + -2.244897959

Combine like terms: 2.244897959 + -2.244897959 = 0.000000000
0.000000000 + -3.87755102t + t2 = 0 + -2.244897959
-3.87755102t + t2 = 0 + -2.244897959

Combine like terms: 0 + -2.244897959 = -2.244897959
-3.87755102t + t2 = -2.244897959

The t term is -3.87755102t.  Take half its coefficient (-1.93877551).
Square it (3.758850478) and add it to both sides.

Add '3.758850478' to each side of the equation.
-3.87755102t + 3.758850478 + t2 = -2.244897959 + 3.758850478

Reorder the terms:
3.758850478 + -3.87755102t + t2 = -2.244897959 + 3.758850478

Combine like terms: -2.244897959 + 3.758850478 = 1.513952519
3.758850478 + -3.87755102t + t2 = 1.513952519

Factor a perfect square on the left side:
(t + -1.93877551)(t + -1.93877551) = 1.513952519

Calculate the square root of the right side: 1.230427779

Break this problem into two subproblems by setting 
(t + -1.93877551) equal to 1.230427779 and -1.230427779.

Subproblem 1

t + -1.93877551 = 1.230427779 Simplifying t + -1.93877551 = 1.230427779 Reorder the terms: -1.93877551 + t = 1.230427779 Solving -1.93877551 + t = 1.230427779 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.93877551' to each side of the equation. -1.93877551 + 1.93877551 + t = 1.230427779 + 1.93877551 Combine like terms: -1.93877551 + 1.93877551 = 0.00000000 0.00000000 + t = 1.230427779 + 1.93877551 t = 1.230427779 + 1.93877551 Combine like terms: 1.230427779 + 1.93877551 = 3.169203289 t = 3.169203289 Simplifying t = 3.169203289

Subproblem 2

t + -1.93877551 = -1.230427779 Simplifying t + -1.93877551 = -1.230427779 Reorder the terms: -1.93877551 + t = -1.230427779 Solving -1.93877551 + t = -1.230427779 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.93877551' to each side of the equation. -1.93877551 + 1.93877551 + t = -1.230427779 + 1.93877551 Combine like terms: -1.93877551 + 1.93877551 = 0.00000000 0.00000000 + t = -1.230427779 + 1.93877551 t = -1.230427779 + 1.93877551 Combine like terms: -1.230427779 + 1.93877551 = 0.708347731 t = 0.708347731 Simplifying t = 0.708347731

Solution

The solution to the problem is based on the solutions from the subproblems. t = {3.169203289, 0.708347731}

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