2.066=9t-9.8t^2

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Solution for 2.066=9t-9.8t^2 equation:


Simplifying
2.066 = 9t + -9.8t2

Solving
2.066 = 9t + -9.8t2

Solving for variable 't'.

Reorder the terms:
2.066 + -9t + 9.8t2 = 9t + -9t + -9.8t2 + 9.8t2

Combine like terms: 9t + -9t = 0
2.066 + -9t + 9.8t2 = 0 + -9.8t2 + 9.8t2
2.066 + -9t + 9.8t2 = -9.8t2 + 9.8t2

Combine like terms: -9.8t2 + 9.8t2 = 0.0
2.066 + -9t + 9.8t2 = 0.0

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

Divide each side by '9.8'.
0.2108163265 + -0.9183673469t + t2 = 0

Move the constant term to the right:

Add '-0.2108163265' to each side of the equation.
0.2108163265 + -0.9183673469t + -0.2108163265 + t2 = 0 + -0.2108163265

Reorder the terms:
0.2108163265 + -0.2108163265 + -0.9183673469t + t2 = 0 + -0.2108163265

Combine like terms: 0.2108163265 + -0.2108163265 = 0.0000000000
0.0000000000 + -0.9183673469t + t2 = 0 + -0.2108163265
-0.9183673469t + t2 = 0 + -0.2108163265

Combine like terms: 0 + -0.2108163265 = -0.2108163265
-0.9183673469t + t2 = -0.2108163265

The t term is -0.9183673469t.  Take half its coefficient (-0.4591836735).
Square it (0.2108496460) and add it to both sides.

Add '0.2108496460' to each side of the equation.
-0.9183673469t + 0.2108496460 + t2 = -0.2108163265 + 0.2108496460

Reorder the terms:
0.2108496460 + -0.9183673469t + t2 = -0.2108163265 + 0.2108496460

Combine like terms: -0.2108163265 + 0.2108496460 = 0.0000333195
0.2108496460 + -0.9183673469t + t2 = 0.0000333195

Factor a perfect square on the left side:
(t + -0.4591836735)(t + -0.4591836735) = 0.0000333195

Calculate the square root of the right side: 0.005772305

Break this problem into two subproblems by setting 
(t + -0.4591836735) equal to 0.005772305 and -0.005772305.

Subproblem 1

t + -0.4591836735 = 0.005772305 Simplifying t + -0.4591836735 = 0.005772305 Reorder the terms: -0.4591836735 + t = 0.005772305 Solving -0.4591836735 + t = 0.005772305 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.4591836735' to each side of the equation. -0.4591836735 + 0.4591836735 + t = 0.005772305 + 0.4591836735 Combine like terms: -0.4591836735 + 0.4591836735 = 0.0000000000 0.0000000000 + t = 0.005772305 + 0.4591836735 t = 0.005772305 + 0.4591836735 Combine like terms: 0.005772305 + 0.4591836735 = 0.4649559785 t = 0.4649559785 Simplifying t = 0.4649559785

Subproblem 2

t + -0.4591836735 = -0.005772305 Simplifying t + -0.4591836735 = -0.005772305 Reorder the terms: -0.4591836735 + t = -0.005772305 Solving -0.4591836735 + t = -0.005772305 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.4591836735' to each side of the equation. -0.4591836735 + 0.4591836735 + t = -0.005772305 + 0.4591836735 Combine like terms: -0.4591836735 + 0.4591836735 = 0.0000000000 0.0000000000 + t = -0.005772305 + 0.4591836735 t = -0.005772305 + 0.4591836735 Combine like terms: -0.005772305 + 0.4591836735 = 0.4534113685 t = 0.4534113685 Simplifying t = 0.4534113685

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.4649559785, 0.4534113685}

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