-16t^2+40t+555=0

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Solution for -16t^2+40t+555=0 equation:


Simplifying
-16t2 + 40t + 555 = 0

Reorder the terms:
555 + 40t + -16t2 = 0

Solving
555 + 40t + -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'.
-34.6875 + -2.5t + t2 = 0

Move the constant term to the right:

Add '34.6875' to each side of the equation.
-34.6875 + -2.5t + 34.6875 + t2 = 0 + 34.6875

Reorder the terms:
-34.6875 + 34.6875 + -2.5t + t2 = 0 + 34.6875

Combine like terms: -34.6875 + 34.6875 = 0.0000
0.0000 + -2.5t + t2 = 0 + 34.6875
-2.5t + t2 = 0 + 34.6875

Combine like terms: 0 + 34.6875 = 34.6875
-2.5t + t2 = 34.6875

The t term is -2.5t.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5t + 1.5625 + t2 = 34.6875 + 1.5625

Reorder the terms:
1.5625 + -2.5t + t2 = 34.6875 + 1.5625

Combine like terms: 34.6875 + 1.5625 = 36.25
1.5625 + -2.5t + t2 = 36.25

Factor a perfect square on the left side:
(t + -1.25)(t + -1.25) = 36.25

Calculate the square root of the right side: 6.020797289

Break this problem into two subproblems by setting 
(t + -1.25) equal to 6.020797289 and -6.020797289.

Subproblem 1

t + -1.25 = 6.020797289 Simplifying t + -1.25 = 6.020797289 Reorder the terms: -1.25 + t = 6.020797289 Solving -1.25 + t = 6.020797289 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + t = 6.020797289 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + t = 6.020797289 + 1.25 t = 6.020797289 + 1.25 Combine like terms: 6.020797289 + 1.25 = 7.270797289 t = 7.270797289 Simplifying t = 7.270797289

Subproblem 2

t + -1.25 = -6.020797289 Simplifying t + -1.25 = -6.020797289 Reorder the terms: -1.25 + t = -6.020797289 Solving -1.25 + t = -6.020797289 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + t = -6.020797289 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + t = -6.020797289 + 1.25 t = -6.020797289 + 1.25 Combine like terms: -6.020797289 + 1.25 = -4.770797289 t = -4.770797289 Simplifying t = -4.770797289

Solution

The solution to the problem is based on the solutions from the subproblems. t = {7.270797289, -4.770797289}

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