0=-16t^2+25t+8

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Solution for 0=-16t^2+25t+8 equation:


Simplifying
0 = -16t2 + 25t + 8

Reorder the terms:
0 = 8 + 25t + -16t2

Solving
0 = 8 + 25t + -16t2

Solving for variable 't'.

Combine like terms: 0 + -8 = -8
-8 + -25t + 16t2 = 8 + 25t + -16t2 + -8 + -25t + 16t2

Reorder the terms:
-8 + -25t + 16t2 = 8 + -8 + 25t + -25t + -16t2 + 16t2

Combine like terms: 8 + -8 = 0
-8 + -25t + 16t2 = 0 + 25t + -25t + -16t2 + 16t2
-8 + -25t + 16t2 = 25t + -25t + -16t2 + 16t2

Combine like terms: 25t + -25t = 0
-8 + -25t + 16t2 = 0 + -16t2 + 16t2
-8 + -25t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
-8 + -25t + 16t2 = 0

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

Divide each side by '16'.
-0.5 + -1.5625t + t2 = 0

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + -1.5625t + 0.5 + t2 = 0 + 0.5

Reorder the terms:
-0.5 + 0.5 + -1.5625t + t2 = 0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + -1.5625t + t2 = 0 + 0.5
-1.5625t + t2 = 0 + 0.5

Combine like terms: 0 + 0.5 = 0.5
-1.5625t + t2 = 0.5

The t term is -1.5625t.  Take half its coefficient (-0.78125).
Square it (0.6103515625) and add it to both sides.

Add '0.6103515625' to each side of the equation.
-1.5625t + 0.6103515625 + t2 = 0.5 + 0.6103515625

Reorder the terms:
0.6103515625 + -1.5625t + t2 = 0.5 + 0.6103515625

Combine like terms: 0.5 + 0.6103515625 = 1.1103515625
0.6103515625 + -1.5625t + t2 = 1.1103515625

Factor a perfect square on the left side:
(t + -0.78125)(t + -0.78125) = 1.1103515625

Calculate the square root of the right side: 1.053732206

Break this problem into two subproblems by setting 
(t + -0.78125) equal to 1.053732206 and -1.053732206.

Subproblem 1

t + -0.78125 = 1.053732206 Simplifying t + -0.78125 = 1.053732206 Reorder the terms: -0.78125 + t = 1.053732206 Solving -0.78125 + t = 1.053732206 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.78125' to each side of the equation. -0.78125 + 0.78125 + t = 1.053732206 + 0.78125 Combine like terms: -0.78125 + 0.78125 = 0.00000 0.00000 + t = 1.053732206 + 0.78125 t = 1.053732206 + 0.78125 Combine like terms: 1.053732206 + 0.78125 = 1.834982206 t = 1.834982206 Simplifying t = 1.834982206

Subproblem 2

t + -0.78125 = -1.053732206 Simplifying t + -0.78125 = -1.053732206 Reorder the terms: -0.78125 + t = -1.053732206 Solving -0.78125 + t = -1.053732206 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.78125' to each side of the equation. -0.78125 + 0.78125 + t = -1.053732206 + 0.78125 Combine like terms: -0.78125 + 0.78125 = 0.00000 0.00000 + t = -1.053732206 + 0.78125 t = -1.053732206 + 0.78125 Combine like terms: -1.053732206 + 0.78125 = -0.272482206 t = -0.272482206 Simplifying t = -0.272482206

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.834982206, -0.272482206}

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