0=-4.9t^2+3t+2

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Solution for 0=-4.9t^2+3t+2 equation:


Simplifying
0 = -4.9t2 + 3t + 2

Reorder the terms:
0 = 2 + 3t + -4.9t2

Solving
0 = 2 + 3t + -4.9t2

Solving for variable 't'.

Combine like terms: 0 + -2 = -2
-2 + -3t + 4.9t2 = 2 + 3t + -4.9t2 + -2 + -3t + 4.9t2

Reorder the terms:
-2 + -3t + 4.9t2 = 2 + -2 + 3t + -3t + -4.9t2 + 4.9t2

Combine like terms: 2 + -2 = 0
-2 + -3t + 4.9t2 = 0 + 3t + -3t + -4.9t2 + 4.9t2
-2 + -3t + 4.9t2 = 3t + -3t + -4.9t2 + 4.9t2

Combine like terms: 3t + -3t = 0
-2 + -3t + 4.9t2 = 0 + -4.9t2 + 4.9t2
-2 + -3t + 4.9t2 = -4.9t2 + 4.9t2

Combine like terms: -4.9t2 + 4.9t2 = 0.0
-2 + -3t + 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 + -0.612244898t + t2 = 0

Move the constant term to the right:

Add '0.4081632653' to each side of the equation.
-0.4081632653 + -0.612244898t + 0.4081632653 + t2 = 0 + 0.4081632653

Reorder the terms:
-0.4081632653 + 0.4081632653 + -0.612244898t + t2 = 0 + 0.4081632653

Combine like terms: -0.4081632653 + 0.4081632653 = 0.0000000000
0.0000000000 + -0.612244898t + t2 = 0 + 0.4081632653
-0.612244898t + t2 = 0 + 0.4081632653

Combine like terms: 0 + 0.4081632653 = 0.4081632653
-0.612244898t + t2 = 0.4081632653

The t term is -0.612244898t.  Take half its coefficient (-0.306122449).
Square it (0.09371095378) and add it to both sides.

Add '0.09371095378' to each side of the equation.
-0.612244898t + 0.09371095378 + t2 = 0.4081632653 + 0.09371095378

Reorder the terms:
0.09371095378 + -0.612244898t + t2 = 0.4081632653 + 0.09371095378

Combine like terms: 0.4081632653 + 0.09371095378 = 0.50187421908
0.09371095378 + -0.612244898t + t2 = 0.50187421908

Factor a perfect square on the left side:
(t + -0.306122449)(t + -0.306122449) = 0.50187421908

Calculate the square root of the right side: 0.708430815

Break this problem into two subproblems by setting 
(t + -0.306122449) equal to 0.708430815 and -0.708430815.

Subproblem 1

t + -0.306122449 = 0.708430815 Simplifying t + -0.306122449 = 0.708430815 Reorder the terms: -0.306122449 + t = 0.708430815 Solving -0.306122449 + t = 0.708430815 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.306122449' to each side of the equation. -0.306122449 + 0.306122449 + t = 0.708430815 + 0.306122449 Combine like terms: -0.306122449 + 0.306122449 = 0.000000000 0.000000000 + t = 0.708430815 + 0.306122449 t = 0.708430815 + 0.306122449 Combine like terms: 0.708430815 + 0.306122449 = 1.014553264 t = 1.014553264 Simplifying t = 1.014553264

Subproblem 2

t + -0.306122449 = -0.708430815 Simplifying t + -0.306122449 = -0.708430815 Reorder the terms: -0.306122449 + t = -0.708430815 Solving -0.306122449 + t = -0.708430815 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.306122449' to each side of the equation. -0.306122449 + 0.306122449 + t = -0.708430815 + 0.306122449 Combine like terms: -0.306122449 + 0.306122449 = 0.000000000 0.000000000 + t = -0.708430815 + 0.306122449 t = -0.708430815 + 0.306122449 Combine like terms: -0.708430815 + 0.306122449 = -0.402308366 t = -0.402308366 Simplifying t = -0.402308366

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.014553264, -0.402308366}

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