-16t^2+138t+55=0

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Solution for -16t^2+138t+55=0 equation:


Simplifying
-16t2 + 138t + 55 = 0

Reorder the terms:
55 + 138t + -16t2 = 0

Solving
55 + 138t + -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'.
-3.4375 + -8.625t + t2 = 0

Move the constant term to the right:

Add '3.4375' to each side of the equation.
-3.4375 + -8.625t + 3.4375 + t2 = 0 + 3.4375

Reorder the terms:
-3.4375 + 3.4375 + -8.625t + t2 = 0 + 3.4375

Combine like terms: -3.4375 + 3.4375 = 0.0000
0.0000 + -8.625t + t2 = 0 + 3.4375
-8.625t + t2 = 0 + 3.4375

Combine like terms: 0 + 3.4375 = 3.4375
-8.625t + t2 = 3.4375

The t term is -8.625t.  Take half its coefficient (-4.3125).
Square it (18.59765625) and add it to both sides.

Add '18.59765625' to each side of the equation.
-8.625t + 18.59765625 + t2 = 3.4375 + 18.59765625

Reorder the terms:
18.59765625 + -8.625t + t2 = 3.4375 + 18.59765625

Combine like terms: 3.4375 + 18.59765625 = 22.03515625
18.59765625 + -8.625t + t2 = 22.03515625

Factor a perfect square on the left side:
(t + -4.3125)(t + -4.3125) = 22.03515625

Calculate the square root of the right side: 4.694161933

Break this problem into two subproblems by setting 
(t + -4.3125) equal to 4.694161933 and -4.694161933.

Subproblem 1

t + -4.3125 = 4.694161933 Simplifying t + -4.3125 = 4.694161933 Reorder the terms: -4.3125 + t = 4.694161933 Solving -4.3125 + t = 4.694161933 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '4.3125' to each side of the equation. -4.3125 + 4.3125 + t = 4.694161933 + 4.3125 Combine like terms: -4.3125 + 4.3125 = 0.0000 0.0000 + t = 4.694161933 + 4.3125 t = 4.694161933 + 4.3125 Combine like terms: 4.694161933 + 4.3125 = 9.006661933 t = 9.006661933 Simplifying t = 9.006661933

Subproblem 2

t + -4.3125 = -4.694161933 Simplifying t + -4.3125 = -4.694161933 Reorder the terms: -4.3125 + t = -4.694161933 Solving -4.3125 + t = -4.694161933 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '4.3125' to each side of the equation. -4.3125 + 4.3125 + t = -4.694161933 + 4.3125 Combine like terms: -4.3125 + 4.3125 = 0.0000 0.0000 + t = -4.694161933 + 4.3125 t = -4.694161933 + 4.3125 Combine like terms: -4.694161933 + 4.3125 = -0.381661933 t = -0.381661933 Simplifying t = -0.381661933

Solution

The solution to the problem is based on the solutions from the subproblems. t = {9.006661933, -0.381661933}

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