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

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


Simplifying
-4.9t2 + 33.6t + 4.9 = 0

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

Solving
4.9 + 33.6t + -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'.
-1 + -6.857142857t + t2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + -6.857142857t + 1 + t2 = 0 + 1

Reorder the terms:
-1 + 1 + -6.857142857t + t2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -6.857142857t + t2 = 0 + 1
-6.857142857t + t2 = 0 + 1

Combine like terms: 0 + 1 = 1
-6.857142857t + t2 = 1

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 = 1 + 11.75510204

Reorder the terms:
11.75510204 + -6.857142857t + t2 = 1 + 11.75510204

Combine like terms: 1 + 11.75510204 = 12.75510204
11.75510204 + -6.857142857t + t2 = 12.75510204

Factor a perfect square on the left side:
(t + -3.428571429)(t + -3.428571429) = 12.75510204

Calculate the square root of the right side: 3.571428571

Break this problem into two subproblems by setting 
(t + -3.428571429) equal to 3.571428571 and -3.571428571.

Subproblem 1

t + -3.428571429 = 3.571428571 Simplifying t + -3.428571429 = 3.571428571 Reorder the terms: -3.428571429 + t = 3.571428571 Solving -3.428571429 + t = 3.571428571 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 = 3.571428571 + 3.428571429 Combine like terms: -3.428571429 + 3.428571429 = 0.000000000 0.000000000 + t = 3.571428571 + 3.428571429 t = 3.571428571 + 3.428571429 Combine like terms: 3.571428571 + 3.428571429 = 7 t = 7 Simplifying t = 7

Subproblem 2

t + -3.428571429 = -3.571428571 Simplifying t + -3.428571429 = -3.571428571 Reorder the terms: -3.428571429 + t = -3.571428571 Solving -3.428571429 + t = -3.571428571 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 = -3.571428571 + 3.428571429 Combine like terms: -3.428571429 + 3.428571429 = 0.000000000 0.000000000 + t = -3.571428571 + 3.428571429 t = -3.571428571 + 3.428571429 Combine like terms: -3.571428571 + 3.428571429 = -0.142857142 t = -0.142857142 Simplifying t = -0.142857142

Solution

The solution to the problem is based on the solutions from the subproblems. t = {7, -0.142857142}

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