0=4.9t^2+30t+3.2

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Solution for 0=4.9t^2+30t+3.2 equation:


Simplifying
0 = 4.9t2 + 30t + 3.2

Reorder the terms:
0 = 3.2 + 30t + 4.9t2

Solving
0 = 3.2 + 30t + 4.9t2

Solving for variable 't'.

Combine like terms: 0 + -3.2 = -3.2
-3.2 + -30t + -4.9t2 = 3.2 + 30t + 4.9t2 + -3.2 + -30t + -4.9t2

Reorder the terms:
-3.2 + -30t + -4.9t2 = 3.2 + -3.2 + 30t + -30t + 4.9t2 + -4.9t2

Combine like terms: 3.2 + -3.2 = 0.0
-3.2 + -30t + -4.9t2 = 0.0 + 30t + -30t + 4.9t2 + -4.9t2
-3.2 + -30t + -4.9t2 = 30t + -30t + 4.9t2 + -4.9t2

Combine like terms: 30t + -30t = 0
-3.2 + -30t + -4.9t2 = 0 + 4.9t2 + -4.9t2
-3.2 + -30t + -4.9t2 = 4.9t2 + -4.9t2

Combine like terms: 4.9t2 + -4.9t2 = 0.0
-3.2 + -30t + -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'.
0.6530612245 + 6.12244898t + t2 = 0

Move the constant term to the right:

Add '-0.6530612245' to each side of the equation.
0.6530612245 + 6.12244898t + -0.6530612245 + t2 = 0 + -0.6530612245

Reorder the terms:
0.6530612245 + -0.6530612245 + 6.12244898t + t2 = 0 + -0.6530612245

Combine like terms: 0.6530612245 + -0.6530612245 = 0.0000000000
0.0000000000 + 6.12244898t + t2 = 0 + -0.6530612245
6.12244898t + t2 = 0 + -0.6530612245

Combine like terms: 0 + -0.6530612245 = -0.6530612245
6.12244898t + t2 = -0.6530612245

The t term is 6.12244898t.  Take half its coefficient (3.06122449).
Square it (9.371095378) and add it to both sides.

Add '9.371095378' to each side of the equation.
6.12244898t + 9.371095378 + t2 = -0.6530612245 + 9.371095378

Reorder the terms:
9.371095378 + 6.12244898t + t2 = -0.6530612245 + 9.371095378

Combine like terms: -0.6530612245 + 9.371095378 = 8.7180341535
9.371095378 + 6.12244898t + t2 = 8.7180341535

Factor a perfect square on the left side:
(t + 3.06122449)(t + 3.06122449) = 8.7180341535

Calculate the square root of the right side: 2.952631733

Break this problem into two subproblems by setting 
(t + 3.06122449) equal to 2.952631733 and -2.952631733.

Subproblem 1

t + 3.06122449 = 2.952631733 Simplifying t + 3.06122449 = 2.952631733 Reorder the terms: 3.06122449 + t = 2.952631733 Solving 3.06122449 + t = 2.952631733 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-3.06122449' to each side of the equation. 3.06122449 + -3.06122449 + t = 2.952631733 + -3.06122449 Combine like terms: 3.06122449 + -3.06122449 = 0.00000000 0.00000000 + t = 2.952631733 + -3.06122449 t = 2.952631733 + -3.06122449 Combine like terms: 2.952631733 + -3.06122449 = -0.108592757 t = -0.108592757 Simplifying t = -0.108592757

Subproblem 2

t + 3.06122449 = -2.952631733 Simplifying t + 3.06122449 = -2.952631733 Reorder the terms: 3.06122449 + t = -2.952631733 Solving 3.06122449 + t = -2.952631733 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-3.06122449' to each side of the equation. 3.06122449 + -3.06122449 + t = -2.952631733 + -3.06122449 Combine like terms: 3.06122449 + -3.06122449 = 0.00000000 0.00000000 + t = -2.952631733 + -3.06122449 t = -2.952631733 + -3.06122449 Combine like terms: -2.952631733 + -3.06122449 = -6.013856223 t = -6.013856223 Simplifying t = -6.013856223

Solution

The solution to the problem is based on the solutions from the subproblems. t = {-0.108592757, -6.013856223}

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