4.9t^2+20t=-3.05

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Solution for 4.9t^2+20t=-3.05 equation:


Simplifying
4.9t2 + 20t = -3.05

Reorder the terms:
20t + 4.9t2 = -3.05

Solving
20t + 4.9t2 = -3.05

Solving for variable 't'.

Reorder the terms:
3.05 + 20t + 4.9t2 = -3.05 + 3.05

Combine like terms: -3.05 + 3.05 = 0.00
3.05 + 20t + 4.9t2 = 0.00

Begin completing the square.  Divide all terms by
4.9 the coefficient of the squared term: 

Divide each side by '4.9'.
0.6224489796 + 4.081632653t + t2 = 0.0

Move the constant term to the right:

Add '-0.6224489796' to each side of the equation.
0.6224489796 + 4.081632653t + -0.6224489796 + t2 = 0.0 + -0.6224489796

Reorder the terms:
0.6224489796 + -0.6224489796 + 4.081632653t + t2 = 0.0 + -0.6224489796

Combine like terms: 0.6224489796 + -0.6224489796 = 0.0000000000
0.0000000000 + 4.081632653t + t2 = 0.0 + -0.6224489796
4.081632653t + t2 = 0.0 + -0.6224489796

Combine like terms: 0.0 + -0.6224489796 = -0.6224489796
4.081632653t + t2 = -0.6224489796

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 = -0.6224489796 + 4.164931281

Reorder the terms:
4.164931281 + 4.081632653t + t2 = -0.6224489796 + 4.164931281

Combine like terms: -0.6224489796 + 4.164931281 = 3.5424823014
4.164931281 + 4.081632653t + t2 = 3.5424823014

Factor a perfect square on the left side:
(t + 2.040816327)(t + 2.040816327) = 3.5424823014

Calculate the square root of the right side: 1.882148321

Break this problem into two subproblems by setting 
(t + 2.040816327) equal to 1.882148321 and -1.882148321.

Subproblem 1

t + 2.040816327 = 1.882148321 Simplifying t + 2.040816327 = 1.882148321 Reorder the terms: 2.040816327 + t = 1.882148321 Solving 2.040816327 + t = 1.882148321 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 = 1.882148321 + -2.040816327 Combine like terms: 2.040816327 + -2.040816327 = 0.000000000 0.000000000 + t = 1.882148321 + -2.040816327 t = 1.882148321 + -2.040816327 Combine like terms: 1.882148321 + -2.040816327 = -0.158668006 t = -0.158668006 Simplifying t = -0.158668006

Subproblem 2

t + 2.040816327 = -1.882148321 Simplifying t + 2.040816327 = -1.882148321 Reorder the terms: 2.040816327 + t = -1.882148321 Solving 2.040816327 + t = -1.882148321 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 = -1.882148321 + -2.040816327 Combine like terms: 2.040816327 + -2.040816327 = 0.000000000 0.000000000 + t = -1.882148321 + -2.040816327 t = -1.882148321 + -2.040816327 Combine like terms: -1.882148321 + -2.040816327 = -3.922964648 t = -3.922964648 Simplifying t = -3.922964648

Solution

The solution to the problem is based on the solutions from the subproblems. t = {-0.158668006, -3.922964648}

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