-16t^2+80t+145=0

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Solution for -16t^2+80t+145=0 equation:


Simplifying
-16t2 + 80t + 145 = 0

Reorder the terms:
145 + 80t + -16t2 = 0

Solving
145 + 80t + -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'.
-9.0625 + -5t + t2 = 0

Move the constant term to the right:

Add '9.0625' to each side of the equation.
-9.0625 + -5t + 9.0625 + t2 = 0 + 9.0625

Reorder the terms:
-9.0625 + 9.0625 + -5t + t2 = 0 + 9.0625

Combine like terms: -9.0625 + 9.0625 = 0.0000
0.0000 + -5t + t2 = 0 + 9.0625
-5t + t2 = 0 + 9.0625

Combine like terms: 0 + 9.0625 = 9.0625
-5t + t2 = 9.0625

The t term is -5t.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5t + 6.25 + t2 = 9.0625 + 6.25

Reorder the terms:
6.25 + -5t + t2 = 9.0625 + 6.25

Combine like terms: 9.0625 + 6.25 = 15.3125
6.25 + -5t + t2 = 15.3125

Factor a perfect square on the left side:
(t + -2.5)(t + -2.5) = 15.3125

Calculate the square root of the right side: 3.913118961

Break this problem into two subproblems by setting 
(t + -2.5) equal to 3.913118961 and -3.913118961.

Subproblem 1

t + -2.5 = 3.913118961 Simplifying t + -2.5 = 3.913118961 Reorder the terms: -2.5 + t = 3.913118961 Solving -2.5 + t = 3.913118961 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + t = 3.913118961 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + t = 3.913118961 + 2.5 t = 3.913118961 + 2.5 Combine like terms: 3.913118961 + 2.5 = 6.413118961 t = 6.413118961 Simplifying t = 6.413118961

Subproblem 2

t + -2.5 = -3.913118961 Simplifying t + -2.5 = -3.913118961 Reorder the terms: -2.5 + t = -3.913118961 Solving -2.5 + t = -3.913118961 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + t = -3.913118961 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + t = -3.913118961 + 2.5 t = -3.913118961 + 2.5 Combine like terms: -3.913118961 + 2.5 = -1.413118961 t = -1.413118961 Simplifying t = -1.413118961

Solution

The solution to the problem is based on the solutions from the subproblems. t = {6.413118961, -1.413118961}

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