-16t^2+77t+5=0

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Solution for -16t^2+77t+5=0 equation:


Simplifying
-16t2 + 77t + 5 = 0

Reorder the terms:
5 + 77t + -16t2 = 0

Solving
5 + 77t + -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'.
-0.3125 + -4.8125t + t2 = 0

Move the constant term to the right:

Add '0.3125' to each side of the equation.
-0.3125 + -4.8125t + 0.3125 + t2 = 0 + 0.3125

Reorder the terms:
-0.3125 + 0.3125 + -4.8125t + t2 = 0 + 0.3125

Combine like terms: -0.3125 + 0.3125 = 0.0000
0.0000 + -4.8125t + t2 = 0 + 0.3125
-4.8125t + t2 = 0 + 0.3125

Combine like terms: 0 + 0.3125 = 0.3125
-4.8125t + t2 = 0.3125

The t term is -4.8125t.  Take half its coefficient (-2.40625).
Square it (5.790039063) and add it to both sides.

Add '5.790039063' to each side of the equation.
-4.8125t + 5.790039063 + t2 = 0.3125 + 5.790039063

Reorder the terms:
5.790039063 + -4.8125t + t2 = 0.3125 + 5.790039063

Combine like terms: 0.3125 + 5.790039063 = 6.102539063
5.790039063 + -4.8125t + t2 = 6.102539063

Factor a perfect square on the left side:
(t + -2.40625)(t + -2.40625) = 6.102539063

Calculate the square root of the right side: 2.470331772

Break this problem into two subproblems by setting 
(t + -2.40625) equal to 2.470331772 and -2.470331772.

Subproblem 1

t + -2.40625 = 2.470331772 Simplifying t + -2.40625 = 2.470331772 Reorder the terms: -2.40625 + t = 2.470331772 Solving -2.40625 + t = 2.470331772 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.40625' to each side of the equation. -2.40625 + 2.40625 + t = 2.470331772 + 2.40625 Combine like terms: -2.40625 + 2.40625 = 0.00000 0.00000 + t = 2.470331772 + 2.40625 t = 2.470331772 + 2.40625 Combine like terms: 2.470331772 + 2.40625 = 4.876581772 t = 4.876581772 Simplifying t = 4.876581772

Subproblem 2

t + -2.40625 = -2.470331772 Simplifying t + -2.40625 = -2.470331772 Reorder the terms: -2.40625 + t = -2.470331772 Solving -2.40625 + t = -2.470331772 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.40625' to each side of the equation. -2.40625 + 2.40625 + t = -2.470331772 + 2.40625 Combine like terms: -2.40625 + 2.40625 = 0.00000 0.00000 + t = -2.470331772 + 2.40625 t = -2.470331772 + 2.40625 Combine like terms: -2.470331772 + 2.40625 = -0.064081772 t = -0.064081772 Simplifying t = -0.064081772

Solution

The solution to the problem is based on the solutions from the subproblems. t = {4.876581772, -0.064081772}

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