0=-16t^2+8t+1.9

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Solution for 0=-16t^2+8t+1.9 equation:


Simplifying
0 = -16t2 + 8t + 1.9

Reorder the terms:
0 = 1.9 + 8t + -16t2

Solving
0 = 1.9 + 8t + -16t2

Solving for variable 't'.

Combine like terms: 0 + -1.9 = -1.9
-1.9 + -8t + 16t2 = 1.9 + 8t + -16t2 + -1.9 + -8t + 16t2

Reorder the terms:
-1.9 + -8t + 16t2 = 1.9 + -1.9 + 8t + -8t + -16t2 + 16t2

Combine like terms: 1.9 + -1.9 = 0.0
-1.9 + -8t + 16t2 = 0.0 + 8t + -8t + -16t2 + 16t2
-1.9 + -8t + 16t2 = 8t + -8t + -16t2 + 16t2

Combine like terms: 8t + -8t = 0
-1.9 + -8t + 16t2 = 0 + -16t2 + 16t2
-1.9 + -8t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
-1.9 + -8t + 16t2 = 0

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

Divide each side by '16'.
-0.11875 + -0.5t + t2 = 0

Move the constant term to the right:

Add '0.11875' to each side of the equation.
-0.11875 + -0.5t + 0.11875 + t2 = 0 + 0.11875

Reorder the terms:
-0.11875 + 0.11875 + -0.5t + t2 = 0 + 0.11875

Combine like terms: -0.11875 + 0.11875 = 0.00000
0.00000 + -0.5t + t2 = 0 + 0.11875
-0.5t + t2 = 0 + 0.11875

Combine like terms: 0 + 0.11875 = 0.11875
-0.5t + t2 = 0.11875

The t term is -0.5t.  Take half its coefficient (-0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
-0.5t + 0.0625 + t2 = 0.11875 + 0.0625

Reorder the terms:
0.0625 + -0.5t + t2 = 0.11875 + 0.0625

Combine like terms: 0.11875 + 0.0625 = 0.18125
0.0625 + -0.5t + t2 = 0.18125

Factor a perfect square on the left side:
(t + -0.25)(t + -0.25) = 0.18125

Calculate the square root of the right side: 0.425734659

Break this problem into two subproblems by setting 
(t + -0.25) equal to 0.425734659 and -0.425734659.

Subproblem 1

t + -0.25 = 0.425734659 Simplifying t + -0.25 = 0.425734659 Reorder the terms: -0.25 + t = 0.425734659 Solving -0.25 + t = 0.425734659 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + t = 0.425734659 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + t = 0.425734659 + 0.25 t = 0.425734659 + 0.25 Combine like terms: 0.425734659 + 0.25 = 0.675734659 t = 0.675734659 Simplifying t = 0.675734659

Subproblem 2

t + -0.25 = -0.425734659 Simplifying t + -0.25 = -0.425734659 Reorder the terms: -0.25 + t = -0.425734659 Solving -0.25 + t = -0.425734659 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + t = -0.425734659 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + t = -0.425734659 + 0.25 t = -0.425734659 + 0.25 Combine like terms: -0.425734659 + 0.25 = -0.175734659 t = -0.175734659 Simplifying t = -0.175734659

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.675734659, -0.175734659}

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