4.9t^2-(4.2104*0.259*t)-0.28=0

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Solution for 4.9t^2-(4.2104*0.259*t)-0.28=0 equation:


Simplifying
4.9t2 + -1(4.2104 * 0.259t) + -0.28 = 0

Multiply 4.2104 * 0.259
4.9t2 + -1(1.0904936t) + -0.28 = 0

Remove parenthesis around (1.0904936t)
4.9t2 + -1 * 1.0904936t + -0.28 = 0

Multiply -1 * 1.0904936
4.9t2 + -1.0904936t + -0.28 = 0

Reorder the terms:
-0.28 + -1.0904936t + 4.9t2 = 0

Solving
-0.28 + -1.0904936t + 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'.
-0.05714285714 + -0.2225497143t + t2 = 0

Move the constant term to the right:

Add '0.05714285714' to each side of the equation.
-0.05714285714 + -0.2225497143t + 0.05714285714 + t2 = 0 + 0.05714285714

Reorder the terms:
-0.05714285714 + 0.05714285714 + -0.2225497143t + t2 = 0 + 0.05714285714

Combine like terms: -0.05714285714 + 0.05714285714 = 0.00000000000
0.00000000000 + -0.2225497143t + t2 = 0 + 0.05714285714
-0.2225497143t + t2 = 0 + 0.05714285714

Combine like terms: 0 + 0.05714285714 = 0.05714285714
-0.2225497143t + t2 = 0.05714285714

The t term is -0.2225497143t.  Take half its coefficient (-0.1112748572).
Square it (0.01238209384) and add it to both sides.

Add '0.01238209384' to each side of the equation.
-0.2225497143t + 0.01238209384 + t2 = 0.05714285714 + 0.01238209384

Reorder the terms:
0.01238209384 + -0.2225497143t + t2 = 0.05714285714 + 0.01238209384

Combine like terms: 0.05714285714 + 0.01238209384 = 0.06952495098
0.01238209384 + -0.2225497143t + t2 = 0.06952495098

Factor a perfect square on the left side:
(t + -0.1112748572)(t + -0.1112748572) = 0.06952495098

Calculate the square root of the right side: 0.263675845

Break this problem into two subproblems by setting 
(t + -0.1112748572) equal to 0.263675845 and -0.263675845.

Subproblem 1

t + -0.1112748572 = 0.263675845 Simplifying t + -0.1112748572 = 0.263675845 Reorder the terms: -0.1112748572 + t = 0.263675845 Solving -0.1112748572 + t = 0.263675845 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.1112748572' to each side of the equation. -0.1112748572 + 0.1112748572 + t = 0.263675845 + 0.1112748572 Combine like terms: -0.1112748572 + 0.1112748572 = 0.0000000000 0.0000000000 + t = 0.263675845 + 0.1112748572 t = 0.263675845 + 0.1112748572 Combine like terms: 0.263675845 + 0.1112748572 = 0.3749507022 t = 0.3749507022 Simplifying t = 0.3749507022

Subproblem 2

t + -0.1112748572 = -0.263675845 Simplifying t + -0.1112748572 = -0.263675845 Reorder the terms: -0.1112748572 + t = -0.263675845 Solving -0.1112748572 + t = -0.263675845 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.1112748572' to each side of the equation. -0.1112748572 + 0.1112748572 + t = -0.263675845 + 0.1112748572 Combine like terms: -0.1112748572 + 0.1112748572 = 0.0000000000 0.0000000000 + t = -0.263675845 + 0.1112748572 t = -0.263675845 + 0.1112748572 Combine like terms: -0.263675845 + 0.1112748572 = -0.1524009878 t = -0.1524009878 Simplifying t = -0.1524009878

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.3749507022, -0.1524009878}

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