25=-16t^2+56t

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Solution for 25=-16t^2+56t equation:


Simplifying
25 = -16t2 + 56t

Reorder the terms:
25 = 56t + -16t2

Solving
25 = 56t + -16t2

Solving for variable 't'.

Reorder the terms:
25 + -56t + 16t2 = 56t + -56t + -16t2 + 16t2

Combine like terms: 56t + -56t = 0
25 + -56t + 16t2 = 0 + -16t2 + 16t2
25 + -56t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
25 + -56t + 16t2 = 0

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

Divide each side by '16'.
1.5625 + -3.5t + t2 = 0

Move the constant term to the right:

Add '-1.5625' to each side of the equation.
1.5625 + -3.5t + -1.5625 + t2 = 0 + -1.5625

Reorder the terms:
1.5625 + -1.5625 + -3.5t + t2 = 0 + -1.5625

Combine like terms: 1.5625 + -1.5625 = 0.0000
0.0000 + -3.5t + t2 = 0 + -1.5625
-3.5t + t2 = 0 + -1.5625

Combine like terms: 0 + -1.5625 = -1.5625
-3.5t + t2 = -1.5625

The t term is -3.5t.  Take half its coefficient (-1.75).
Square it (3.0625) and add it to both sides.

Add '3.0625' to each side of the equation.
-3.5t + 3.0625 + t2 = -1.5625 + 3.0625

Reorder the terms:
3.0625 + -3.5t + t2 = -1.5625 + 3.0625

Combine like terms: -1.5625 + 3.0625 = 1.5
3.0625 + -3.5t + t2 = 1.5

Factor a perfect square on the left side:
(t + -1.75)(t + -1.75) = 1.5

Calculate the square root of the right side: 1.224744871

Break this problem into two subproblems by setting 
(t + -1.75) equal to 1.224744871 and -1.224744871.

Subproblem 1

t + -1.75 = 1.224744871 Simplifying t + -1.75 = 1.224744871 Reorder the terms: -1.75 + t = 1.224744871 Solving -1.75 + t = 1.224744871 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.75' to each side of the equation. -1.75 + 1.75 + t = 1.224744871 + 1.75 Combine like terms: -1.75 + 1.75 = 0.00 0.00 + t = 1.224744871 + 1.75 t = 1.224744871 + 1.75 Combine like terms: 1.224744871 + 1.75 = 2.974744871 t = 2.974744871 Simplifying t = 2.974744871

Subproblem 2

t + -1.75 = -1.224744871 Simplifying t + -1.75 = -1.224744871 Reorder the terms: -1.75 + t = -1.224744871 Solving -1.75 + t = -1.224744871 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.75' to each side of the equation. -1.75 + 1.75 + t = -1.224744871 + 1.75 Combine like terms: -1.75 + 1.75 = 0.00 0.00 + t = -1.224744871 + 1.75 t = -1.224744871 + 1.75 Combine like terms: -1.224744871 + 1.75 = 0.525255129 t = 0.525255129 Simplifying t = 0.525255129

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.974744871, 0.525255129}

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