15=-16t^2-44t

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Solution for 15=-16t^2-44t equation:


Simplifying
15 = -16t2 + -44t

Reorder the terms:
15 = -44t + -16t2

Solving
15 = -44t + -16t2

Solving for variable 't'.

Reorder the terms:
15 + 44t + 16t2 = -44t + 44t + -16t2 + 16t2

Combine like terms: -44t + 44t = 0
15 + 44t + 16t2 = 0 + -16t2 + 16t2
15 + 44t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
15 + 44t + 16t2 = 0

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

Divide each side by '16'.
0.9375 + 2.75t + t2 = 0

Move the constant term to the right:

Add '-0.9375' to each side of the equation.
0.9375 + 2.75t + -0.9375 + t2 = 0 + -0.9375

Reorder the terms:
0.9375 + -0.9375 + 2.75t + t2 = 0 + -0.9375

Combine like terms: 0.9375 + -0.9375 = 0.0000
0.0000 + 2.75t + t2 = 0 + -0.9375
2.75t + t2 = 0 + -0.9375

Combine like terms: 0 + -0.9375 = -0.9375
2.75t + t2 = -0.9375

The t term is 2.75t.  Take half its coefficient (1.375).
Square it (1.890625) and add it to both sides.

Add '1.890625' to each side of the equation.
2.75t + 1.890625 + t2 = -0.9375 + 1.890625

Reorder the terms:
1.890625 + 2.75t + t2 = -0.9375 + 1.890625

Combine like terms: -0.9375 + 1.890625 = 0.953125
1.890625 + 2.75t + t2 = 0.953125

Factor a perfect square on the left side:
(t + 1.375)(t + 1.375) = 0.953125

Calculate the square root of the right side: 0.976281209

Break this problem into two subproblems by setting 
(t + 1.375) equal to 0.976281209 and -0.976281209.

Subproblem 1

t + 1.375 = 0.976281209 Simplifying t + 1.375 = 0.976281209 Reorder the terms: 1.375 + t = 0.976281209 Solving 1.375 + t = 0.976281209 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1.375' to each side of the equation. 1.375 + -1.375 + t = 0.976281209 + -1.375 Combine like terms: 1.375 + -1.375 = 0.000 0.000 + t = 0.976281209 + -1.375 t = 0.976281209 + -1.375 Combine like terms: 0.976281209 + -1.375 = -0.398718791 t = -0.398718791 Simplifying t = -0.398718791

Subproblem 2

t + 1.375 = -0.976281209 Simplifying t + 1.375 = -0.976281209 Reorder the terms: 1.375 + t = -0.976281209 Solving 1.375 + t = -0.976281209 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1.375' to each side of the equation. 1.375 + -1.375 + t = -0.976281209 + -1.375 Combine like terms: 1.375 + -1.375 = 0.000 0.000 + t = -0.976281209 + -1.375 t = -0.976281209 + -1.375 Combine like terms: -0.976281209 + -1.375 = -2.351281209 t = -2.351281209 Simplifying t = -2.351281209

Solution

The solution to the problem is based on the solutions from the subproblems. t = {-0.398718791, -2.351281209}

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