4.9t^2-19.4t+3.5=0

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Solution for 4.9t^2-19.4t+3.5=0 equation:


Simplifying
4.9t2 + -19.4t + 3.5 = 0

Reorder the terms:
3.5 + -19.4t + 4.9t2 = 0

Solving
3.5 + -19.4t + 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'.
0.7142857143 + -3.959183673t + t2 = 0

Move the constant term to the right:

Add '-0.7142857143' to each side of the equation.
0.7142857143 + -3.959183673t + -0.7142857143 + t2 = 0 + -0.7142857143

Reorder the terms:
0.7142857143 + -0.7142857143 + -3.959183673t + t2 = 0 + -0.7142857143

Combine like terms: 0.7142857143 + -0.7142857143 = 0.0000000000
0.0000000000 + -3.959183673t + t2 = 0 + -0.7142857143
-3.959183673t + t2 = 0 + -0.7142857143

Combine like terms: 0 + -0.7142857143 = -0.7142857143
-3.959183673t + t2 = -0.7142857143

The t term is -3.959183673t.  Take half its coefficient (-1.979591837).
Square it (3.918783841) and add it to both sides.

Add '3.918783841' to each side of the equation.
-3.959183673t + 3.918783841 + t2 = -0.7142857143 + 3.918783841

Reorder the terms:
3.918783841 + -3.959183673t + t2 = -0.7142857143 + 3.918783841

Combine like terms: -0.7142857143 + 3.918783841 = 3.2044981267
3.918783841 + -3.959183673t + t2 = 3.2044981267

Factor a perfect square on the left side:
(t + -1.979591837)(t + -1.979591837) = 3.2044981267

Calculate the square root of the right side: 1.790111205

Break this problem into two subproblems by setting 
(t + -1.979591837) equal to 1.790111205 and -1.790111205.

Subproblem 1

t + -1.979591837 = 1.790111205 Simplifying t + -1.979591837 = 1.790111205 Reorder the terms: -1.979591837 + t = 1.790111205 Solving -1.979591837 + t = 1.790111205 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.979591837' to each side of the equation. -1.979591837 + 1.979591837 + t = 1.790111205 + 1.979591837 Combine like terms: -1.979591837 + 1.979591837 = 0.000000000 0.000000000 + t = 1.790111205 + 1.979591837 t = 1.790111205 + 1.979591837 Combine like terms: 1.790111205 + 1.979591837 = 3.769703042 t = 3.769703042 Simplifying t = 3.769703042

Subproblem 2

t + -1.979591837 = -1.790111205 Simplifying t + -1.979591837 = -1.790111205 Reorder the terms: -1.979591837 + t = -1.790111205 Solving -1.979591837 + t = -1.790111205 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.979591837' to each side of the equation. -1.979591837 + 1.979591837 + t = -1.790111205 + 1.979591837 Combine like terms: -1.979591837 + 1.979591837 = 0.000000000 0.000000000 + t = -1.790111205 + 1.979591837 t = -1.790111205 + 1.979591837 Combine like terms: -1.790111205 + 1.979591837 = 0.189480632 t = 0.189480632 Simplifying t = 0.189480632

Solution

The solution to the problem is based on the solutions from the subproblems. t = {3.769703042, 0.189480632}

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