170=-16t^2+122t+131

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Solution for 170=-16t^2+122t+131 equation:


Simplifying
170 = -16t2 + 122t + 131

Reorder the terms:
170 = 131 + 122t + -16t2

Solving
170 = 131 + 122t + -16t2

Solving for variable 't'.

Combine like terms: 170 + -131 = 39
39 + -122t + 16t2 = 131 + 122t + -16t2 + -131 + -122t + 16t2

Reorder the terms:
39 + -122t + 16t2 = 131 + -131 + 122t + -122t + -16t2 + 16t2

Combine like terms: 131 + -131 = 0
39 + -122t + 16t2 = 0 + 122t + -122t + -16t2 + 16t2
39 + -122t + 16t2 = 122t + -122t + -16t2 + 16t2

Combine like terms: 122t + -122t = 0
39 + -122t + 16t2 = 0 + -16t2 + 16t2
39 + -122t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
39 + -122t + 16t2 = 0

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

Divide each side by '16'.
2.4375 + -7.625t + t2 = 0

Move the constant term to the right:

Add '-2.4375' to each side of the equation.
2.4375 + -7.625t + -2.4375 + t2 = 0 + -2.4375

Reorder the terms:
2.4375 + -2.4375 + -7.625t + t2 = 0 + -2.4375

Combine like terms: 2.4375 + -2.4375 = 0.0000
0.0000 + -7.625t + t2 = 0 + -2.4375
-7.625t + t2 = 0 + -2.4375

Combine like terms: 0 + -2.4375 = -2.4375
-7.625t + t2 = -2.4375

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 = -2.4375 + 14.53515625

Reorder the terms:
14.53515625 + -7.625t + t2 = -2.4375 + 14.53515625

Combine like terms: -2.4375 + 14.53515625 = 12.09765625
14.53515625 + -7.625t + t2 = 12.09765625

Factor a perfect square on the left side:
(t + -3.8125)(t + -3.8125) = 12.09765625

Calculate the square root of the right side: 3.478168519

Break this problem into two subproblems by setting 
(t + -3.8125) equal to 3.478168519 and -3.478168519.

Subproblem 1

t + -3.8125 = 3.478168519 Simplifying t + -3.8125 = 3.478168519 Reorder the terms: -3.8125 + t = 3.478168519 Solving -3.8125 + t = 3.478168519 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 = 3.478168519 + 3.8125 Combine like terms: -3.8125 + 3.8125 = 0.0000 0.0000 + t = 3.478168519 + 3.8125 t = 3.478168519 + 3.8125 Combine like terms: 3.478168519 + 3.8125 = 7.290668519 t = 7.290668519 Simplifying t = 7.290668519

Subproblem 2

t + -3.8125 = -3.478168519 Simplifying t + -3.8125 = -3.478168519 Reorder the terms: -3.8125 + t = -3.478168519 Solving -3.8125 + t = -3.478168519 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 = -3.478168519 + 3.8125 Combine like terms: -3.8125 + 3.8125 = 0.0000 0.0000 + t = -3.478168519 + 3.8125 t = -3.478168519 + 3.8125 Combine like terms: -3.478168519 + 3.8125 = 0.334331481 t = 0.334331481 Simplifying t = 0.334331481

Solution

The solution to the problem is based on the solutions from the subproblems. t = {7.290668519, 0.334331481}

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