-4.9t^2+10t+2=0

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Solution for -4.9t^2+10t+2=0 equation:


Simplifying
-4.9t2 + 10t + 2 = 0

Reorder the terms:
2 + 10t + -4.9t2 = 0

Solving
2 + 10t + -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'.
-0.4081632653 + -2.040816327t + t2 = 0

Move the constant term to the right:

Add '0.4081632653' to each side of the equation.
-0.4081632653 + -2.040816327t + 0.4081632653 + t2 = 0 + 0.4081632653

Reorder the terms:
-0.4081632653 + 0.4081632653 + -2.040816327t + t2 = 0 + 0.4081632653

Combine like terms: -0.4081632653 + 0.4081632653 = 0.0000000000
0.0000000000 + -2.040816327t + t2 = 0 + 0.4081632653
-2.040816327t + t2 = 0 + 0.4081632653

Combine like terms: 0 + 0.4081632653 = 0.4081632653
-2.040816327t + t2 = 0.4081632653

The t term is -2.040816327t.  Take half its coefficient (-1.020408164).
Square it (1.041232821) and add it to both sides.

Add '1.041232821' to each side of the equation.
-2.040816327t + 1.041232821 + t2 = 0.4081632653 + 1.041232821

Reorder the terms:
1.041232821 + -2.040816327t + t2 = 0.4081632653 + 1.041232821

Combine like terms: 0.4081632653 + 1.041232821 = 1.4493960863
1.041232821 + -2.040816327t + t2 = 1.4493960863

Factor a perfect square on the left side:
(t + -1.020408164)(t + -1.020408164) = 1.4493960863

Calculate the square root of the right side: 1.20390867

Break this problem into two subproblems by setting 
(t + -1.020408164) equal to 1.20390867 and -1.20390867.

Subproblem 1

t + -1.020408164 = 1.20390867 Simplifying t + -1.020408164 = 1.20390867 Reorder the terms: -1.020408164 + t = 1.20390867 Solving -1.020408164 + t = 1.20390867 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.020408164' to each side of the equation. -1.020408164 + 1.020408164 + t = 1.20390867 + 1.020408164 Combine like terms: -1.020408164 + 1.020408164 = 0.000000000 0.000000000 + t = 1.20390867 + 1.020408164 t = 1.20390867 + 1.020408164 Combine like terms: 1.20390867 + 1.020408164 = 2.224316834 t = 2.224316834 Simplifying t = 2.224316834

Subproblem 2

t + -1.020408164 = -1.20390867 Simplifying t + -1.020408164 = -1.20390867 Reorder the terms: -1.020408164 + t = -1.20390867 Solving -1.020408164 + t = -1.20390867 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.020408164' to each side of the equation. -1.020408164 + 1.020408164 + t = -1.20390867 + 1.020408164 Combine like terms: -1.020408164 + 1.020408164 = 0.000000000 0.000000000 + t = -1.20390867 + 1.020408164 t = -1.20390867 + 1.020408164 Combine like terms: -1.20390867 + 1.020408164 = -0.183500506 t = -0.183500506 Simplifying t = -0.183500506

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.224316834, -0.183500506}

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