0=-4.9t^2+14t+3

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Solution for 0=-4.9t^2+14t+3 equation:


Simplifying
0 = -4.9t2 + 14t + 3

Reorder the terms:
0 = 3 + 14t + -4.9t2

Solving
0 = 3 + 14t + -4.9t2

Solving for variable 't'.

Combine like terms: 0 + -3 = -3
-3 + -14t + 4.9t2 = 3 + 14t + -4.9t2 + -3 + -14t + 4.9t2

Reorder the terms:
-3 + -14t + 4.9t2 = 3 + -3 + 14t + -14t + -4.9t2 + 4.9t2

Combine like terms: 3 + -3 = 0
-3 + -14t + 4.9t2 = 0 + 14t + -14t + -4.9t2 + 4.9t2
-3 + -14t + 4.9t2 = 14t + -14t + -4.9t2 + 4.9t2

Combine like terms: 14t + -14t = 0
-3 + -14t + 4.9t2 = 0 + -4.9t2 + 4.9t2
-3 + -14t + 4.9t2 = -4.9t2 + 4.9t2

Combine like terms: -4.9t2 + 4.9t2 = 0.0
-3 + -14t + 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 + -2.857142857t + t2 = 0

Move the constant term to the right:

Add '0.612244898' to each side of the equation.
-0.612244898 + -2.857142857t + 0.612244898 + t2 = 0 + 0.612244898

Reorder the terms:
-0.612244898 + 0.612244898 + -2.857142857t + t2 = 0 + 0.612244898

Combine like terms: -0.612244898 + 0.612244898 = 0.000000000
0.000000000 + -2.857142857t + t2 = 0 + 0.612244898
-2.857142857t + t2 = 0 + 0.612244898

Combine like terms: 0 + 0.612244898 = 0.612244898
-2.857142857t + t2 = 0.612244898

The t term is -2.857142857t.  Take half its coefficient (-1.428571429).
Square it (2.040816328) and add it to both sides.

Add '2.040816328' to each side of the equation.
-2.857142857t + 2.040816328 + t2 = 0.612244898 + 2.040816328

Reorder the terms:
2.040816328 + -2.857142857t + t2 = 0.612244898 + 2.040816328

Combine like terms: 0.612244898 + 2.040816328 = 2.653061226
2.040816328 + -2.857142857t + t2 = 2.653061226

Factor a perfect square on the left side:
(t + -1.428571429)(t + -1.428571429) = 2.653061226

Calculate the square root of the right side: 1.628822036

Break this problem into two subproblems by setting 
(t + -1.428571429) equal to 1.628822036 and -1.628822036.

Subproblem 1

t + -1.428571429 = 1.628822036 Simplifying t + -1.428571429 = 1.628822036 Reorder the terms: -1.428571429 + t = 1.628822036 Solving -1.428571429 + t = 1.628822036 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.428571429' to each side of the equation. -1.428571429 + 1.428571429 + t = 1.628822036 + 1.428571429 Combine like terms: -1.428571429 + 1.428571429 = 0.000000000 0.000000000 + t = 1.628822036 + 1.428571429 t = 1.628822036 + 1.428571429 Combine like terms: 1.628822036 + 1.428571429 = 3.057393465 t = 3.057393465 Simplifying t = 3.057393465

Subproblem 2

t + -1.428571429 = -1.628822036 Simplifying t + -1.428571429 = -1.628822036 Reorder the terms: -1.428571429 + t = -1.628822036 Solving -1.428571429 + t = -1.628822036 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.428571429' to each side of the equation. -1.428571429 + 1.428571429 + t = -1.628822036 + 1.428571429 Combine like terms: -1.428571429 + 1.428571429 = 0.000000000 0.000000000 + t = -1.628822036 + 1.428571429 t = -1.628822036 + 1.428571429 Combine like terms: -1.628822036 + 1.428571429 = -0.200250607 t = -0.200250607 Simplifying t = -0.200250607

Solution

The solution to the problem is based on the solutions from the subproblems. t = {3.057393465, -0.200250607}

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