0=-4.9t^2+33.6t+49

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Solution for 0=-4.9t^2+33.6t+49 equation:


Simplifying
0 = -4.9t2 + 33.6t + 49

Reorder the terms:
0 = 49 + 33.6t + -4.9t2

Solving
0 = 49 + 33.6t + -4.9t2

Solving for variable 't'.

Combine like terms: 0 + -49 = -49
-49 + -33.6t + 4.9t2 = 49 + 33.6t + -4.9t2 + -49 + -33.6t + 4.9t2

Reorder the terms:
-49 + -33.6t + 4.9t2 = 49 + -49 + 33.6t + -33.6t + -4.9t2 + 4.9t2

Combine like terms: 49 + -49 = 0
-49 + -33.6t + 4.9t2 = 0 + 33.6t + -33.6t + -4.9t2 + 4.9t2
-49 + -33.6t + 4.9t2 = 33.6t + -33.6t + -4.9t2 + 4.9t2

Combine like terms: 33.6t + -33.6t = 0.0
-49 + -33.6t + 4.9t2 = 0.0 + -4.9t2 + 4.9t2
-49 + -33.6t + 4.9t2 = -4.9t2 + 4.9t2

Combine like terms: -4.9t2 + 4.9t2 = 0.0
-49 + -33.6t + 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'.
-10 + -6.857142857t + t2 = 0

Move the constant term to the right:

Add '10' to each side of the equation.
-10 + -6.857142857t + 10 + t2 = 0 + 10

Reorder the terms:
-10 + 10 + -6.857142857t + t2 = 0 + 10

Combine like terms: -10 + 10 = 0
0 + -6.857142857t + t2 = 0 + 10
-6.857142857t + t2 = 0 + 10

Combine like terms: 0 + 10 = 10
-6.857142857t + t2 = 10

The t term is -6.857142857t.  Take half its coefficient (-3.428571429).
Square it (11.75510204) and add it to both sides.

Add '11.75510204' to each side of the equation.
-6.857142857t + 11.75510204 + t2 = 10 + 11.75510204

Reorder the terms:
11.75510204 + -6.857142857t + t2 = 10 + 11.75510204

Combine like terms: 10 + 11.75510204 = 21.75510204
11.75510204 + -6.857142857t + t2 = 21.75510204

Factor a perfect square on the left side:
(t + -3.428571429)(t + -3.428571429) = 21.75510204

Calculate the square root of the right side: 4.664236491

Break this problem into two subproblems by setting 
(t + -3.428571429) equal to 4.664236491 and -4.664236491.

Subproblem 1

t + -3.428571429 = 4.664236491 Simplifying t + -3.428571429 = 4.664236491 Reorder the terms: -3.428571429 + t = 4.664236491 Solving -3.428571429 + t = 4.664236491 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.428571429' to each side of the equation. -3.428571429 + 3.428571429 + t = 4.664236491 + 3.428571429 Combine like terms: -3.428571429 + 3.428571429 = 0.000000000 0.000000000 + t = 4.664236491 + 3.428571429 t = 4.664236491 + 3.428571429 Combine like terms: 4.664236491 + 3.428571429 = 8.09280792 t = 8.09280792 Simplifying t = 8.09280792

Subproblem 2

t + -3.428571429 = -4.664236491 Simplifying t + -3.428571429 = -4.664236491 Reorder the terms: -3.428571429 + t = -4.664236491 Solving -3.428571429 + t = -4.664236491 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.428571429' to each side of the equation. -3.428571429 + 3.428571429 + t = -4.664236491 + 3.428571429 Combine like terms: -3.428571429 + 3.428571429 = 0.000000000 0.000000000 + t = -4.664236491 + 3.428571429 t = -4.664236491 + 3.428571429 Combine like terms: -4.664236491 + 3.428571429 = -1.235665062 t = -1.235665062 Simplifying t = -1.235665062

Solution

The solution to the problem is based on the solutions from the subproblems. t = {8.09280792, -1.235665062}

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