25=-16t^2+5t+92

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Solution for 25=-16t^2+5t+92 equation:


Simplifying
25 = -16t2 + 5t + 92

Reorder the terms:
25 = 92 + 5t + -16t2

Solving
25 = 92 + 5t + -16t2

Solving for variable 't'.

Combine like terms: 25 + -92 = -67
-67 + -5t + 16t2 = 92 + 5t + -16t2 + -92 + -5t + 16t2

Reorder the terms:
-67 + -5t + 16t2 = 92 + -92 + 5t + -5t + -16t2 + 16t2

Combine like terms: 92 + -92 = 0
-67 + -5t + 16t2 = 0 + 5t + -5t + -16t2 + 16t2
-67 + -5t + 16t2 = 5t + -5t + -16t2 + 16t2

Combine like terms: 5t + -5t = 0
-67 + -5t + 16t2 = 0 + -16t2 + 16t2
-67 + -5t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
-67 + -5t + 16t2 = 0

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

Divide each side by '16'.
-4.1875 + -0.3125t + t2 = 0

Move the constant term to the right:

Add '4.1875' to each side of the equation.
-4.1875 + -0.3125t + 4.1875 + t2 = 0 + 4.1875

Reorder the terms:
-4.1875 + 4.1875 + -0.3125t + t2 = 0 + 4.1875

Combine like terms: -4.1875 + 4.1875 = 0.0000
0.0000 + -0.3125t + t2 = 0 + 4.1875
-0.3125t + t2 = 0 + 4.1875

Combine like terms: 0 + 4.1875 = 4.1875
-0.3125t + t2 = 4.1875

The t term is -0.3125t.  Take half its coefficient (-0.15625).
Square it (0.0244140625) and add it to both sides.

Add '0.0244140625' to each side of the equation.
-0.3125t + 0.0244140625 + t2 = 4.1875 + 0.0244140625

Reorder the terms:
0.0244140625 + -0.3125t + t2 = 4.1875 + 0.0244140625

Combine like terms: 4.1875 + 0.0244140625 = 4.2119140625
0.0244140625 + -0.3125t + t2 = 4.2119140625

Factor a perfect square on the left side:
(t + -0.15625)(t + -0.15625) = 4.2119140625

Calculate the square root of the right side: 2.052294828

Break this problem into two subproblems by setting 
(t + -0.15625) equal to 2.052294828 and -2.052294828.

Subproblem 1

t + -0.15625 = 2.052294828 Simplifying t + -0.15625 = 2.052294828 Reorder the terms: -0.15625 + t = 2.052294828 Solving -0.15625 + t = 2.052294828 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.15625' to each side of the equation. -0.15625 + 0.15625 + t = 2.052294828 + 0.15625 Combine like terms: -0.15625 + 0.15625 = 0.00000 0.00000 + t = 2.052294828 + 0.15625 t = 2.052294828 + 0.15625 Combine like terms: 2.052294828 + 0.15625 = 2.208544828 t = 2.208544828 Simplifying t = 2.208544828

Subproblem 2

t + -0.15625 = -2.052294828 Simplifying t + -0.15625 = -2.052294828 Reorder the terms: -0.15625 + t = -2.052294828 Solving -0.15625 + t = -2.052294828 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.15625' to each side of the equation. -0.15625 + 0.15625 + t = -2.052294828 + 0.15625 Combine like terms: -0.15625 + 0.15625 = 0.00000 0.00000 + t = -2.052294828 + 0.15625 t = -2.052294828 + 0.15625 Combine like terms: -2.052294828 + 0.15625 = -1.896044828 t = -1.896044828 Simplifying t = -1.896044828

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.208544828, -1.896044828}

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