0=4.9t^2-14t+2

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


Simplifying
0 = 4.9t2 + -14t + 2

Reorder the terms:
0 = 2 + -14t + 4.9t2

Solving
0 = 2 + -14t + 4.9t2

Solving for variable 't'.

Combine like terms: 0 + -2 = -2
-2 + 14t + -4.9t2 = 2 + -14t + 4.9t2 + -2 + 14t + -4.9t2

Reorder the terms:
-2 + 14t + -4.9t2 = 2 + -2 + -14t + 14t + 4.9t2 + -4.9t2

Combine like terms: 2 + -2 = 0
-2 + 14t + -4.9t2 = 0 + -14t + 14t + 4.9t2 + -4.9t2
-2 + 14t + -4.9t2 = -14t + 14t + 4.9t2 + -4.9t2

Combine like terms: -14t + 14t = 0
-2 + 14t + -4.9t2 = 0 + 4.9t2 + -4.9t2
-2 + 14t + -4.9t2 = 4.9t2 + -4.9t2

Combine like terms: 4.9t2 + -4.9t2 = 0.0
-2 + 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'.
0.4081632653 + -2.857142857t + t2 = 0

Move the constant term to the right:

Add '-0.4081632653' to each side of the equation.
0.4081632653 + -2.857142857t + -0.4081632653 + t2 = 0 + -0.4081632653

Reorder the terms:
0.4081632653 + -0.4081632653 + -2.857142857t + t2 = 0 + -0.4081632653

Combine like terms: 0.4081632653 + -0.4081632653 = 0.0000000000
0.0000000000 + -2.857142857t + t2 = 0 + -0.4081632653
-2.857142857t + t2 = 0 + -0.4081632653

Combine like terms: 0 + -0.4081632653 = -0.4081632653
-2.857142857t + t2 = -0.4081632653

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 = -0.4081632653 + 2.040816328

Reorder the terms:
2.040816328 + -2.857142857t + t2 = -0.4081632653 + 2.040816328

Combine like terms: -0.4081632653 + 2.040816328 = 1.6326530627
2.040816328 + -2.857142857t + t2 = 1.6326530627

Factor a perfect square on the left side:
(t + -1.428571429)(t + -1.428571429) = 1.6326530627

Calculate the square root of the right side: 1.277753131

Break this problem into two subproblems by setting 
(t + -1.428571429) equal to 1.277753131 and -1.277753131.

Subproblem 1

t + -1.428571429 = 1.277753131 Simplifying t + -1.428571429 = 1.277753131 Reorder the terms: -1.428571429 + t = 1.277753131 Solving -1.428571429 + t = 1.277753131 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 = 1.277753131 + 1.428571429 Combine like terms: -1.428571429 + 1.428571429 = 0.000000000 0.000000000 + t = 1.277753131 + 1.428571429 t = 1.277753131 + 1.428571429 Combine like terms: 1.277753131 + 1.428571429 = 2.70632456 t = 2.70632456 Simplifying t = 2.70632456

Subproblem 2

t + -1.428571429 = -1.277753131 Simplifying t + -1.428571429 = -1.277753131 Reorder the terms: -1.428571429 + t = -1.277753131 Solving -1.428571429 + t = -1.277753131 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 = -1.277753131 + 1.428571429 Combine like terms: -1.428571429 + 1.428571429 = 0.000000000 0.000000000 + t = -1.277753131 + 1.428571429 t = -1.277753131 + 1.428571429 Combine like terms: -1.277753131 + 1.428571429 = 0.150818298 t = 0.150818298 Simplifying t = 0.150818298

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.70632456, 0.150818298}

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