-16t^2+38.8t+3=0

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Solution for -16t^2+38.8t+3=0 equation:


Simplifying
-16t2 + 38.8t + 3 = 0

Reorder the terms:
3 + 38.8t + -16t2 = 0

Solving
3 + 38.8t + -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'.
-0.1875 + -2.425t + t2 = 0

Move the constant term to the right:

Add '0.1875' to each side of the equation.
-0.1875 + -2.425t + 0.1875 + t2 = 0 + 0.1875

Reorder the terms:
-0.1875 + 0.1875 + -2.425t + t2 = 0 + 0.1875

Combine like terms: -0.1875 + 0.1875 = 0.0000
0.0000 + -2.425t + t2 = 0 + 0.1875
-2.425t + t2 = 0 + 0.1875

Combine like terms: 0 + 0.1875 = 0.1875
-2.425t + t2 = 0.1875

The t term is -2.425t.  Take half its coefficient (-1.2125).
Square it (1.47015625) and add it to both sides.

Add '1.47015625' to each side of the equation.
-2.425t + 1.47015625 + t2 = 0.1875 + 1.47015625

Reorder the terms:
1.47015625 + -2.425t + t2 = 0.1875 + 1.47015625

Combine like terms: 0.1875 + 1.47015625 = 1.65765625
1.47015625 + -2.425t + t2 = 1.65765625

Factor a perfect square on the left side:
(t + -1.2125)(t + -1.2125) = 1.65765625

Calculate the square root of the right side: 1.2875

Break this problem into two subproblems by setting 
(t + -1.2125) equal to 1.2875 and -1.2875.

Subproblem 1

t + -1.2125 = 1.2875 Simplifying t + -1.2125 = 1.2875 Reorder the terms: -1.2125 + t = 1.2875 Solving -1.2125 + t = 1.2875 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.2125' to each side of the equation. -1.2125 + 1.2125 + t = 1.2875 + 1.2125 Combine like terms: -1.2125 + 1.2125 = 0.0000 0.0000 + t = 1.2875 + 1.2125 t = 1.2875 + 1.2125 Combine like terms: 1.2875 + 1.2125 = 2.5 t = 2.5 Simplifying t = 2.5

Subproblem 2

t + -1.2125 = -1.2875 Simplifying t + -1.2125 = -1.2875 Reorder the terms: -1.2125 + t = -1.2875 Solving -1.2125 + t = -1.2875 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.2125' to each side of the equation. -1.2125 + 1.2125 + t = -1.2875 + 1.2125 Combine like terms: -1.2125 + 1.2125 = 0.0000 0.0000 + t = -1.2875 + 1.2125 t = -1.2875 + 1.2125 Combine like terms: -1.2875 + 1.2125 = -0.075 t = -0.075 Simplifying t = -0.075

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.5, -0.075}

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