0=-1.85t^2+30t+6

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Solution for 0=-1.85t^2+30t+6 equation:


Simplifying
0 = -1.85t2 + 30t + 6

Reorder the terms:
0 = 6 + 30t + -1.85t2

Solving
0 = 6 + 30t + -1.85t2

Solving for variable 't'.

Combine like terms: 0 + -6 = -6
-6 + -30t + 1.85t2 = 6 + 30t + -1.85t2 + -6 + -30t + 1.85t2

Reorder the terms:
-6 + -30t + 1.85t2 = 6 + -6 + 30t + -30t + -1.85t2 + 1.85t2

Combine like terms: 6 + -6 = 0
-6 + -30t + 1.85t2 = 0 + 30t + -30t + -1.85t2 + 1.85t2
-6 + -30t + 1.85t2 = 30t + -30t + -1.85t2 + 1.85t2

Combine like terms: 30t + -30t = 0
-6 + -30t + 1.85t2 = 0 + -1.85t2 + 1.85t2
-6 + -30t + 1.85t2 = -1.85t2 + 1.85t2

Combine like terms: -1.85t2 + 1.85t2 = 0.00
-6 + -30t + 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'.
-3.243243243 + -16.21621622t + t2 = 0

Move the constant term to the right:

Add '3.243243243' to each side of the equation.
-3.243243243 + -16.21621622t + 3.243243243 + t2 = 0 + 3.243243243

Reorder the terms:
-3.243243243 + 3.243243243 + -16.21621622t + t2 = 0 + 3.243243243

Combine like terms: -3.243243243 + 3.243243243 = 0.000000000
0.000000000 + -16.21621622t + t2 = 0 + 3.243243243
-16.21621622t + t2 = 0 + 3.243243243

Combine like terms: 0 + 3.243243243 = 3.243243243
-16.21621622t + t2 = 3.243243243

The t term is -16.21621622t.  Take half its coefficient (-8.10810811).
Square it (65.74141712) and add it to both sides.

Add '65.74141712' to each side of the equation.
-16.21621622t + 65.74141712 + t2 = 3.243243243 + 65.74141712

Reorder the terms:
65.74141712 + -16.21621622t + t2 = 3.243243243 + 65.74141712

Combine like terms: 3.243243243 + 65.74141712 = 68.984660363
65.74141712 + -16.21621622t + t2 = 68.984660363

Factor a perfect square on the left side:
(t + -8.10810811)(t + -8.10810811) = 68.984660363

Calculate the square root of the right side: 8.305700474

Break this problem into two subproblems by setting 
(t + -8.10810811) equal to 8.305700474 and -8.305700474.

Subproblem 1

t + -8.10810811 = 8.305700474 Simplifying t + -8.10810811 = 8.305700474 Reorder the terms: -8.10810811 + t = 8.305700474 Solving -8.10810811 + t = 8.305700474 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '8.10810811' to each side of the equation. -8.10810811 + 8.10810811 + t = 8.305700474 + 8.10810811 Combine like terms: -8.10810811 + 8.10810811 = 0.00000000 0.00000000 + t = 8.305700474 + 8.10810811 t = 8.305700474 + 8.10810811 Combine like terms: 8.305700474 + 8.10810811 = 16.413808584 t = 16.413808584 Simplifying t = 16.413808584

Subproblem 2

t + -8.10810811 = -8.305700474 Simplifying t + -8.10810811 = -8.305700474 Reorder the terms: -8.10810811 + t = -8.305700474 Solving -8.10810811 + t = -8.305700474 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '8.10810811' to each side of the equation. -8.10810811 + 8.10810811 + t = -8.305700474 + 8.10810811 Combine like terms: -8.10810811 + 8.10810811 = 0.00000000 0.00000000 + t = -8.305700474 + 8.10810811 t = -8.305700474 + 8.10810811 Combine like terms: -8.305700474 + 8.10810811 = -0.197592364 t = -0.197592364 Simplifying t = -0.197592364

Solution

The solution to the problem is based on the solutions from the subproblems. t = {16.413808584, -0.197592364}

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