-16t^2+38.4t+3.5=0

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Solution for -16t^2+38.4t+3.5=0 equation:


Simplifying
-16t2 + 38.4t + 3.5 = 0

Reorder the terms:
3.5 + 38.4t + -16t2 = 0

Solving
3.5 + 38.4t + -16t2 = 0

Solving for variable 't'.

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

Divide each side by '-16'.
-0.21875 + -2.4t + t2 = 0

Move the constant term to the right:

Add '0.21875' to each side of the equation.
-0.21875 + -2.4t + 0.21875 + t2 = 0 + 0.21875

Reorder the terms:
-0.21875 + 0.21875 + -2.4t + t2 = 0 + 0.21875

Combine like terms: -0.21875 + 0.21875 = 0.00000
0.00000 + -2.4t + t2 = 0 + 0.21875
-2.4t + t2 = 0 + 0.21875

Combine like terms: 0 + 0.21875 = 0.21875
-2.4t + t2 = 0.21875

The t term is -2.4t.  Take half its coefficient (-1.2).
Square it (1.44) and add it to both sides.

Add '1.44' to each side of the equation.
-2.4t + 1.44 + t2 = 0.21875 + 1.44

Reorder the terms:
1.44 + -2.4t + t2 = 0.21875 + 1.44

Combine like terms: 0.21875 + 1.44 = 1.65875
1.44 + -2.4t + t2 = 1.65875

Factor a perfect square on the left side:
(t + -1.2)(t + -1.2) = 1.65875

Calculate the square root of the right side: 1.287924687

Break this problem into two subproblems by setting 
(t + -1.2) equal to 1.287924687 and -1.287924687.

Subproblem 1

t + -1.2 = 1.287924687 Simplifying t + -1.2 = 1.287924687 Reorder the terms: -1.2 + t = 1.287924687 Solving -1.2 + t = 1.287924687 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.2' to each side of the equation. -1.2 + 1.2 + t = 1.287924687 + 1.2 Combine like terms: -1.2 + 1.2 = 0.0 0.0 + t = 1.287924687 + 1.2 t = 1.287924687 + 1.2 Combine like terms: 1.287924687 + 1.2 = 2.487924687 t = 2.487924687 Simplifying t = 2.487924687

Subproblem 2

t + -1.2 = -1.287924687 Simplifying t + -1.2 = -1.287924687 Reorder the terms: -1.2 + t = -1.287924687 Solving -1.2 + t = -1.287924687 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.2' to each side of the equation. -1.2 + 1.2 + t = -1.287924687 + 1.2 Combine like terms: -1.2 + 1.2 = 0.0 0.0 + t = -1.287924687 + 1.2 t = -1.287924687 + 1.2 Combine like terms: -1.287924687 + 1.2 = -0.087924687 t = -0.087924687 Simplifying t = -0.087924687

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.487924687, -0.087924687}

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