0=2+23.5t-4.9t^2

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Solution for 0=2+23.5t-4.9t^2 equation:


Simplifying
0 = 2 + 23.5t + -4.9t2

Solving
0 = 2 + 23.5t + -4.9t2

Solving for variable 't'.

Combine like terms: 0 + -2 = -2
-2 + -23.5t + 4.9t2 = 2 + 23.5t + -4.9t2 + -2 + -23.5t + 4.9t2

Reorder the terms:
-2 + -23.5t + 4.9t2 = 2 + -2 + 23.5t + -23.5t + -4.9t2 + 4.9t2

Combine like terms: 2 + -2 = 0
-2 + -23.5t + 4.9t2 = 0 + 23.5t + -23.5t + -4.9t2 + 4.9t2
-2 + -23.5t + 4.9t2 = 23.5t + -23.5t + -4.9t2 + 4.9t2

Combine like terms: 23.5t + -23.5t = 0.0
-2 + -23.5t + 4.9t2 = 0.0 + -4.9t2 + 4.9t2
-2 + -23.5t + 4.9t2 = -4.9t2 + 4.9t2

Combine like terms: -4.9t2 + 4.9t2 = 0.0
-2 + -23.5t + 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 + -4.795918367t + t2 = 0

Move the constant term to the right:

Add '0.4081632653' to each side of the equation.
-0.4081632653 + -4.795918367t + 0.4081632653 + t2 = 0 + 0.4081632653

Reorder the terms:
-0.4081632653 + 0.4081632653 + -4.795918367t + t2 = 0 + 0.4081632653

Combine like terms: -0.4081632653 + 0.4081632653 = 0.0000000000
0.0000000000 + -4.795918367t + t2 = 0 + 0.4081632653
-4.795918367t + t2 = 0 + 0.4081632653

Combine like terms: 0 + 0.4081632653 = 0.4081632653
-4.795918367t + t2 = 0.4081632653

The t term is -4.795918367t.  Take half its coefficient (-2.397959184).
Square it (5.750208248) and add it to both sides.

Add '5.750208248' to each side of the equation.
-4.795918367t + 5.750208248 + t2 = 0.4081632653 + 5.750208248

Reorder the terms:
5.750208248 + -4.795918367t + t2 = 0.4081632653 + 5.750208248

Combine like terms: 0.4081632653 + 5.750208248 = 6.1583715133
5.750208248 + -4.795918367t + t2 = 6.1583715133

Factor a perfect square on the left side:
(t + -2.397959184)(t + -2.397959184) = 6.1583715133

Calculate the square root of the right side: 2.48160664

Break this problem into two subproblems by setting 
(t + -2.397959184) equal to 2.48160664 and -2.48160664.

Subproblem 1

t + -2.397959184 = 2.48160664 Simplifying t + -2.397959184 = 2.48160664 Reorder the terms: -2.397959184 + t = 2.48160664 Solving -2.397959184 + t = 2.48160664 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.397959184' to each side of the equation. -2.397959184 + 2.397959184 + t = 2.48160664 + 2.397959184 Combine like terms: -2.397959184 + 2.397959184 = 0.000000000 0.000000000 + t = 2.48160664 + 2.397959184 t = 2.48160664 + 2.397959184 Combine like terms: 2.48160664 + 2.397959184 = 4.879565824 t = 4.879565824 Simplifying t = 4.879565824

Subproblem 2

t + -2.397959184 = -2.48160664 Simplifying t + -2.397959184 = -2.48160664 Reorder the terms: -2.397959184 + t = -2.48160664 Solving -2.397959184 + t = -2.48160664 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.397959184' to each side of the equation. -2.397959184 + 2.397959184 + t = -2.48160664 + 2.397959184 Combine like terms: -2.397959184 + 2.397959184 = 0.000000000 0.000000000 + t = -2.48160664 + 2.397959184 t = -2.48160664 + 2.397959184 Combine like terms: -2.48160664 + 2.397959184 = -0.083647456 t = -0.083647456 Simplifying t = -0.083647456

Solution

The solution to the problem is based on the solutions from the subproblems. t = {4.879565824, -0.083647456}

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