0=5+45t-16t^2

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Solution for 0=5+45t-16t^2 equation:


Simplifying
0 = 5 + 45t + -16t2

Solving
0 = 5 + 45t + -16t2

Solving for variable 't'.

Combine like terms: 0 + -5 = -5
-5 + -45t + 16t2 = 5 + 45t + -16t2 + -5 + -45t + 16t2

Reorder the terms:
-5 + -45t + 16t2 = 5 + -5 + 45t + -45t + -16t2 + 16t2

Combine like terms: 5 + -5 = 0
-5 + -45t + 16t2 = 0 + 45t + -45t + -16t2 + 16t2
-5 + -45t + 16t2 = 45t + -45t + -16t2 + 16t2

Combine like terms: 45t + -45t = 0
-5 + -45t + 16t2 = 0 + -16t2 + 16t2
-5 + -45t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
-5 + -45t + 16t2 = 0

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

Divide each side by '16'.
-0.3125 + -2.8125t + t2 = 0

Move the constant term to the right:

Add '0.3125' to each side of the equation.
-0.3125 + -2.8125t + 0.3125 + t2 = 0 + 0.3125

Reorder the terms:
-0.3125 + 0.3125 + -2.8125t + t2 = 0 + 0.3125

Combine like terms: -0.3125 + 0.3125 = 0.0000
0.0000 + -2.8125t + t2 = 0 + 0.3125
-2.8125t + t2 = 0 + 0.3125

Combine like terms: 0 + 0.3125 = 0.3125
-2.8125t + t2 = 0.3125

The t term is -2.8125t.  Take half its coefficient (-1.40625).
Square it (1.977539063) and add it to both sides.

Add '1.977539063' to each side of the equation.
-2.8125t + 1.977539063 + t2 = 0.3125 + 1.977539063

Reorder the terms:
1.977539063 + -2.8125t + t2 = 0.3125 + 1.977539063

Combine like terms: 0.3125 + 1.977539063 = 2.290039063
1.977539063 + -2.8125t + t2 = 2.290039063

Factor a perfect square on the left side:
(t + -1.40625)(t + -1.40625) = 2.290039063

Calculate the square root of the right side: 1.513287502

Break this problem into two subproblems by setting 
(t + -1.40625) equal to 1.513287502 and -1.513287502.

Subproblem 1

t + -1.40625 = 1.513287502 Simplifying t + -1.40625 = 1.513287502 Reorder the terms: -1.40625 + t = 1.513287502 Solving -1.40625 + t = 1.513287502 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.40625' to each side of the equation. -1.40625 + 1.40625 + t = 1.513287502 + 1.40625 Combine like terms: -1.40625 + 1.40625 = 0.00000 0.00000 + t = 1.513287502 + 1.40625 t = 1.513287502 + 1.40625 Combine like terms: 1.513287502 + 1.40625 = 2.919537502 t = 2.919537502 Simplifying t = 2.919537502

Subproblem 2

t + -1.40625 = -1.513287502 Simplifying t + -1.40625 = -1.513287502 Reorder the terms: -1.40625 + t = -1.513287502 Solving -1.40625 + t = -1.513287502 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.40625' to each side of the equation. -1.40625 + 1.40625 + t = -1.513287502 + 1.40625 Combine like terms: -1.40625 + 1.40625 = 0.00000 0.00000 + t = -1.513287502 + 1.40625 t = -1.513287502 + 1.40625 Combine like terms: -1.513287502 + 1.40625 = -0.107037502 t = -0.107037502 Simplifying t = -0.107037502

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.919537502, -0.107037502}

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