-16t^2+56t+25=0

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Solution for -16t^2+56t+25=0 equation:


Simplifying
-16t2 + 56t + 25 = 0

Reorder the terms:
25 + 56t + -16t2 = 0

Solving
25 + 56t + -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'.
-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 = 4.625
3.0625 + -3.5t + t2 = 4.625

Factor a perfect square on the left side:
(t + -1.75)(t + -1.75) = 4.625

Calculate the square root of the right side: 2.150581317

Break this problem into two subproblems by setting 
(t + -1.75) equal to 2.150581317 and -2.150581317.

Subproblem 1

t + -1.75 = 2.150581317 Simplifying t + -1.75 = 2.150581317 Reorder the terms: -1.75 + t = 2.150581317 Solving -1.75 + t = 2.150581317 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 = 2.150581317 + 1.75 Combine like terms: -1.75 + 1.75 = 0.00 0.00 + t = 2.150581317 + 1.75 t = 2.150581317 + 1.75 Combine like terms: 2.150581317 + 1.75 = 3.900581317 t = 3.900581317 Simplifying t = 3.900581317

Subproblem 2

t + -1.75 = -2.150581317 Simplifying t + -1.75 = -2.150581317 Reorder the terms: -1.75 + t = -2.150581317 Solving -1.75 + t = -2.150581317 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 = -2.150581317 + 1.75 Combine like terms: -1.75 + 1.75 = 0.00 0.00 + t = -2.150581317 + 1.75 t = -2.150581317 + 1.75 Combine like terms: -2.150581317 + 1.75 = -0.400581317 t = -0.400581317 Simplifying t = -0.400581317

Solution

The solution to the problem is based on the solutions from the subproblems. t = {3.900581317, -0.400581317}

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