-4.9t^2+-20t+-1=0

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Solution for -4.9t^2+-20t+-1=0 equation:


Simplifying
-4.9t2 + -20t + -1 = 0

Reorder the terms:
-1 + -20t + -4.9t2 = 0

Solving
-1 + -20t + -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'.
0.2040816327 + 4.081632653t + t2 = 0

Move the constant term to the right:

Add '-0.2040816327' to each side of the equation.
0.2040816327 + 4.081632653t + -0.2040816327 + t2 = 0 + -0.2040816327

Reorder the terms:
0.2040816327 + -0.2040816327 + 4.081632653t + t2 = 0 + -0.2040816327

Combine like terms: 0.2040816327 + -0.2040816327 = 0.0000000000
0.0000000000 + 4.081632653t + t2 = 0 + -0.2040816327
4.081632653t + t2 = 0 + -0.2040816327

Combine like terms: 0 + -0.2040816327 = -0.2040816327
4.081632653t + t2 = -0.2040816327

The t term is 4.081632653t.  Take half its coefficient (2.040816327).
Square it (4.164931281) and add it to both sides.

Add '4.164931281' to each side of the equation.
4.081632653t + 4.164931281 + t2 = -0.2040816327 + 4.164931281

Reorder the terms:
4.164931281 + 4.081632653t + t2 = -0.2040816327 + 4.164931281

Combine like terms: -0.2040816327 + 4.164931281 = 3.9608496483
4.164931281 + 4.081632653t + t2 = 3.9608496483

Factor a perfect square on the left side:
(t + 2.040816327)(t + 2.040816327) = 3.9608496483

Calculate the square root of the right side: 1.990188345

Break this problem into two subproblems by setting 
(t + 2.040816327) equal to 1.990188345 and -1.990188345.

Subproblem 1

t + 2.040816327 = 1.990188345 Simplifying t + 2.040816327 = 1.990188345 Reorder the terms: 2.040816327 + t = 1.990188345 Solving 2.040816327 + t = 1.990188345 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-2.040816327' to each side of the equation. 2.040816327 + -2.040816327 + t = 1.990188345 + -2.040816327 Combine like terms: 2.040816327 + -2.040816327 = 0.000000000 0.000000000 + t = 1.990188345 + -2.040816327 t = 1.990188345 + -2.040816327 Combine like terms: 1.990188345 + -2.040816327 = -0.050627982 t = -0.050627982 Simplifying t = -0.050627982

Subproblem 2

t + 2.040816327 = -1.990188345 Simplifying t + 2.040816327 = -1.990188345 Reorder the terms: 2.040816327 + t = -1.990188345 Solving 2.040816327 + t = -1.990188345 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-2.040816327' to each side of the equation. 2.040816327 + -2.040816327 + t = -1.990188345 + -2.040816327 Combine like terms: 2.040816327 + -2.040816327 = 0.000000000 0.000000000 + t = -1.990188345 + -2.040816327 t = -1.990188345 + -2.040816327 Combine like terms: -1.990188345 + -2.040816327 = -4.031004672 t = -4.031004672 Simplifying t = -4.031004672

Solution

The solution to the problem is based on the solutions from the subproblems. t = {-0.050627982, -4.031004672}

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