-4.9t^2+4t+3=0

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Solution for -4.9t^2+4t+3=0 equation:


Simplifying
-4.9t2 + 4t + 3 = 0

Reorder the terms:
3 + 4t + -4.9t2 = 0

Solving
3 + 4t + -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'.
-0.612244898 + -0.8163265306t + t2 = 0

Move the constant term to the right:

Add '0.612244898' to each side of the equation.
-0.612244898 + -0.8163265306t + 0.612244898 + t2 = 0 + 0.612244898

Reorder the terms:
-0.612244898 + 0.612244898 + -0.8163265306t + t2 = 0 + 0.612244898

Combine like terms: -0.612244898 + 0.612244898 = 0.000000000
0.000000000 + -0.8163265306t + t2 = 0 + 0.612244898
-0.8163265306t + t2 = 0 + 0.612244898

Combine like terms: 0 + 0.612244898 = 0.612244898
-0.8163265306t + t2 = 0.612244898

The t term is -0.8163265306t.  Take half its coefficient (-0.4081632653).
Square it (0.1665972511) and add it to both sides.

Add '0.1665972511' to each side of the equation.
-0.8163265306t + 0.1665972511 + t2 = 0.612244898 + 0.1665972511

Reorder the terms:
0.1665972511 + -0.8163265306t + t2 = 0.612244898 + 0.1665972511

Combine like terms: 0.612244898 + 0.1665972511 = 0.7788421491
0.1665972511 + -0.8163265306t + t2 = 0.7788421491

Factor a perfect square on the left side:
(t + -0.4081632653)(t + -0.4081632653) = 0.7788421491

Calculate the square root of the right side: 0.882520339

Break this problem into two subproblems by setting 
(t + -0.4081632653) equal to 0.882520339 and -0.882520339.

Subproblem 1

t + -0.4081632653 = 0.882520339 Simplifying t + -0.4081632653 = 0.882520339 Reorder the terms: -0.4081632653 + t = 0.882520339 Solving -0.4081632653 + t = 0.882520339 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.4081632653' to each side of the equation. -0.4081632653 + 0.4081632653 + t = 0.882520339 + 0.4081632653 Combine like terms: -0.4081632653 + 0.4081632653 = 0.0000000000 0.0000000000 + t = 0.882520339 + 0.4081632653 t = 0.882520339 + 0.4081632653 Combine like terms: 0.882520339 + 0.4081632653 = 1.2906836043 t = 1.2906836043 Simplifying t = 1.2906836043

Subproblem 2

t + -0.4081632653 = -0.882520339 Simplifying t + -0.4081632653 = -0.882520339 Reorder the terms: -0.4081632653 + t = -0.882520339 Solving -0.4081632653 + t = -0.882520339 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.4081632653' to each side of the equation. -0.4081632653 + 0.4081632653 + t = -0.882520339 + 0.4081632653 Combine like terms: -0.4081632653 + 0.4081632653 = 0.0000000000 0.0000000000 + t = -0.882520339 + 0.4081632653 t = -0.882520339 + 0.4081632653 Combine like terms: -0.882520339 + 0.4081632653 = -0.4743570737 t = -0.4743570737 Simplifying t = -0.4743570737

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.2906836043, -0.4743570737}

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