0=-1.85t^2+20t+1

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Solution for 0=-1.85t^2+20t+1 equation:


Simplifying
0 = -1.85t2 + 20t + 1

Reorder the terms:
0 = 1 + 20t + -1.85t2

Solving
0 = 1 + 20t + -1.85t2

Solving for variable 't'.

Combine like terms: 0 + -1 = -1
-1 + -20t + 1.85t2 = 1 + 20t + -1.85t2 + -1 + -20t + 1.85t2

Reorder the terms:
-1 + -20t + 1.85t2 = 1 + -1 + 20t + -20t + -1.85t2 + 1.85t2

Combine like terms: 1 + -1 = 0
-1 + -20t + 1.85t2 = 0 + 20t + -20t + -1.85t2 + 1.85t2
-1 + -20t + 1.85t2 = 20t + -20t + -1.85t2 + 1.85t2

Combine like terms: 20t + -20t = 0
-1 + -20t + 1.85t2 = 0 + -1.85t2 + 1.85t2
-1 + -20t + 1.85t2 = -1.85t2 + 1.85t2

Combine like terms: -1.85t2 + 1.85t2 = 0.00
-1 + -20t + 1.85t2 = 0.00

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

Divide each side by '1.85'.
-0.5405405405 + -10.81081081t + t2 = 0

Move the constant term to the right:

Add '0.5405405405' to each side of the equation.
-0.5405405405 + -10.81081081t + 0.5405405405 + t2 = 0 + 0.5405405405

Reorder the terms:
-0.5405405405 + 0.5405405405 + -10.81081081t + t2 = 0 + 0.5405405405

Combine like terms: -0.5405405405 + 0.5405405405 = 0.0000000000
0.0000000000 + -10.81081081t + t2 = 0 + 0.5405405405
-10.81081081t + t2 = 0 + 0.5405405405

Combine like terms: 0 + 0.5405405405 = 0.5405405405
-10.81081081t + t2 = 0.5405405405

The t term is -10.81081081t.  Take half its coefficient (-5.405405405).
Square it (29.21840759) and add it to both sides.

Add '29.21840759' to each side of the equation.
-10.81081081t + 29.21840759 + t2 = 0.5405405405 + 29.21840759

Reorder the terms:
29.21840759 + -10.81081081t + t2 = 0.5405405405 + 29.21840759

Combine like terms: 0.5405405405 + 29.21840759 = 29.7589481305
29.21840759 + -10.81081081t + t2 = 29.7589481305

Factor a perfect square on the left side:
(t + -5.405405405)(t + -5.405405405) = 29.7589481305

Calculate the square root of the right side: 5.455176269

Break this problem into two subproblems by setting 
(t + -5.405405405) equal to 5.455176269 and -5.455176269.

Subproblem 1

t + -5.405405405 = 5.455176269 Simplifying t + -5.405405405 = 5.455176269 Reorder the terms: -5.405405405 + t = 5.455176269 Solving -5.405405405 + t = 5.455176269 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '5.405405405' to each side of the equation. -5.405405405 + 5.405405405 + t = 5.455176269 + 5.405405405 Combine like terms: -5.405405405 + 5.405405405 = 0.000000000 0.000000000 + t = 5.455176269 + 5.405405405 t = 5.455176269 + 5.405405405 Combine like terms: 5.455176269 + 5.405405405 = 10.860581674 t = 10.860581674 Simplifying t = 10.860581674

Subproblem 2

t + -5.405405405 = -5.455176269 Simplifying t + -5.405405405 = -5.455176269 Reorder the terms: -5.405405405 + t = -5.455176269 Solving -5.405405405 + t = -5.455176269 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '5.405405405' to each side of the equation. -5.405405405 + 5.405405405 + t = -5.455176269 + 5.405405405 Combine like terms: -5.405405405 + 5.405405405 = 0.000000000 0.000000000 + t = -5.455176269 + 5.405405405 t = -5.455176269 + 5.405405405 Combine like terms: -5.455176269 + 5.405405405 = -0.049770864 t = -0.049770864 Simplifying t = -0.049770864

Solution

The solution to the problem is based on the solutions from the subproblems. t = {10.860581674, -0.049770864}

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