4.9t^2+.2t-.775=0

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Solution for 4.9t^2+.2t-.775=0 equation:


Simplifying
4.9t2 + 0.2t + -0.775 = 0

Reorder the terms:
-0.775 + 0.2t + 4.9t2 = 0

Solving
-0.775 + 0.2t + 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'.
-0.1581632653 + 0.04081632653t + t2 = 0

Move the constant term to the right:

Add '0.1581632653' to each side of the equation.
-0.1581632653 + 0.04081632653t + 0.1581632653 + t2 = 0 + 0.1581632653

Reorder the terms:
-0.1581632653 + 0.1581632653 + 0.04081632653t + t2 = 0 + 0.1581632653

Combine like terms: -0.1581632653 + 0.1581632653 = 0.0000000000
0.0000000000 + 0.04081632653t + t2 = 0 + 0.1581632653
0.04081632653t + t2 = 0 + 0.1581632653

Combine like terms: 0 + 0.1581632653 = 0.1581632653
0.04081632653t + t2 = 0.1581632653

The t term is 0.04081632653t.  Take half its coefficient (0.02040816327).
Square it (0.0004164931281) and add it to both sides.

Add '0.0004164931281' to each side of the equation.
0.04081632653t + 0.0004164931281 + t2 = 0.1581632653 + 0.0004164931281

Reorder the terms:
0.0004164931281 + 0.04081632653t + t2 = 0.1581632653 + 0.0004164931281

Combine like terms: 0.1581632653 + 0.0004164931281 = 0.1585797584281
0.0004164931281 + 0.04081632653t + t2 = 0.1585797584281

Factor a perfect square on the left side:
(t + 0.02040816327)(t + 0.02040816327) = 0.1585797584281

Calculate the square root of the right side: 0.398220741

Break this problem into two subproblems by setting 
(t + 0.02040816327) equal to 0.398220741 and -0.398220741.

Subproblem 1

t + 0.02040816327 = 0.398220741 Simplifying t + 0.02040816327 = 0.398220741 Reorder the terms: 0.02040816327 + t = 0.398220741 Solving 0.02040816327 + t = 0.398220741 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.02040816327' to each side of the equation. 0.02040816327 + -0.02040816327 + t = 0.398220741 + -0.02040816327 Combine like terms: 0.02040816327 + -0.02040816327 = 0.00000000000 0.00000000000 + t = 0.398220741 + -0.02040816327 t = 0.398220741 + -0.02040816327 Combine like terms: 0.398220741 + -0.02040816327 = 0.37781257773 t = 0.37781257773 Simplifying t = 0.37781257773

Subproblem 2

t + 0.02040816327 = -0.398220741 Simplifying t + 0.02040816327 = -0.398220741 Reorder the terms: 0.02040816327 + t = -0.398220741 Solving 0.02040816327 + t = -0.398220741 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.02040816327' to each side of the equation. 0.02040816327 + -0.02040816327 + t = -0.398220741 + -0.02040816327 Combine like terms: 0.02040816327 + -0.02040816327 = 0.00000000000 0.00000000000 + t = -0.398220741 + -0.02040816327 t = -0.398220741 + -0.02040816327 Combine like terms: -0.398220741 + -0.02040816327 = -0.41862890427 t = -0.41862890427 Simplifying t = -0.41862890427

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.37781257773, -0.41862890427}

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