0=-16t^2+122t+99

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Solution for 0=-16t^2+122t+99 equation:


Simplifying
0 = -16t2 + 122t + 99

Reorder the terms:
0 = 99 + 122t + -16t2

Solving
0 = 99 + 122t + -16t2

Solving for variable 't'.

Combine like terms: 0 + -99 = -99
-99 + -122t + 16t2 = 99 + 122t + -16t2 + -99 + -122t + 16t2

Reorder the terms:
-99 + -122t + 16t2 = 99 + -99 + 122t + -122t + -16t2 + 16t2

Combine like terms: 99 + -99 = 0
-99 + -122t + 16t2 = 0 + 122t + -122t + -16t2 + 16t2
-99 + -122t + 16t2 = 122t + -122t + -16t2 + 16t2

Combine like terms: 122t + -122t = 0
-99 + -122t + 16t2 = 0 + -16t2 + 16t2
-99 + -122t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
-99 + -122t + 16t2 = 0

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

Divide each side by '16'.
-6.1875 + -7.625t + t2 = 0

Move the constant term to the right:

Add '6.1875' to each side of the equation.
-6.1875 + -7.625t + 6.1875 + t2 = 0 + 6.1875

Reorder the terms:
-6.1875 + 6.1875 + -7.625t + t2 = 0 + 6.1875

Combine like terms: -6.1875 + 6.1875 = 0.0000
0.0000 + -7.625t + t2 = 0 + 6.1875
-7.625t + t2 = 0 + 6.1875

Combine like terms: 0 + 6.1875 = 6.1875
-7.625t + t2 = 6.1875

The t term is -7.625t.  Take half its coefficient (-3.8125).
Square it (14.53515625) and add it to both sides.

Add '14.53515625' to each side of the equation.
-7.625t + 14.53515625 + t2 = 6.1875 + 14.53515625

Reorder the terms:
14.53515625 + -7.625t + t2 = 6.1875 + 14.53515625

Combine like terms: 6.1875 + 14.53515625 = 20.72265625
14.53515625 + -7.625t + t2 = 20.72265625

Factor a perfect square on the left side:
(t + -3.8125)(t + -3.8125) = 20.72265625

Calculate the square root of the right side: 4.552214434

Break this problem into two subproblems by setting 
(t + -3.8125) equal to 4.552214434 and -4.552214434.

Subproblem 1

t + -3.8125 = 4.552214434 Simplifying t + -3.8125 = 4.552214434 Reorder the terms: -3.8125 + t = 4.552214434 Solving -3.8125 + t = 4.552214434 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.8125' to each side of the equation. -3.8125 + 3.8125 + t = 4.552214434 + 3.8125 Combine like terms: -3.8125 + 3.8125 = 0.0000 0.0000 + t = 4.552214434 + 3.8125 t = 4.552214434 + 3.8125 Combine like terms: 4.552214434 + 3.8125 = 8.364714434 t = 8.364714434 Simplifying t = 8.364714434

Subproblem 2

t + -3.8125 = -4.552214434 Simplifying t + -3.8125 = -4.552214434 Reorder the terms: -3.8125 + t = -4.552214434 Solving -3.8125 + t = -4.552214434 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.8125' to each side of the equation. -3.8125 + 3.8125 + t = -4.552214434 + 3.8125 Combine like terms: -3.8125 + 3.8125 = 0.0000 0.0000 + t = -4.552214434 + 3.8125 t = -4.552214434 + 3.8125 Combine like terms: -4.552214434 + 3.8125 = -0.739714434 t = -0.739714434 Simplifying t = -0.739714434

Solution

The solution to the problem is based on the solutions from the subproblems. t = {8.364714434, -0.739714434}

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