0=-16t^2-16t+9

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Solution for 0=-16t^2-16t+9 equation:


Simplifying
0 = -16t2 + -16t + 9

Reorder the terms:
0 = 9 + -16t + -16t2

Solving
0 = 9 + -16t + -16t2

Solving for variable 't'.

Combine like terms: 0 + -9 = -9
-9 + 16t + 16t2 = 9 + -16t + -16t2 + -9 + 16t + 16t2

Reorder the terms:
-9 + 16t + 16t2 = 9 + -9 + -16t + 16t + -16t2 + 16t2

Combine like terms: 9 + -9 = 0
-9 + 16t + 16t2 = 0 + -16t + 16t + -16t2 + 16t2
-9 + 16t + 16t2 = -16t + 16t + -16t2 + 16t2

Combine like terms: -16t + 16t = 0
-9 + 16t + 16t2 = 0 + -16t2 + 16t2
-9 + 16t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
-9 + 16t + 16t2 = 0

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

Divide each side by '16'.
-0.5625 + t + t2 = 0

Move the constant term to the right:

Add '0.5625' to each side of the equation.
-0.5625 + t + 0.5625 + t2 = 0 + 0.5625

Reorder the terms:
-0.5625 + 0.5625 + t + t2 = 0 + 0.5625

Combine like terms: -0.5625 + 0.5625 = 0.0000
0.0000 + t + t2 = 0 + 0.5625
t + t2 = 0 + 0.5625

Combine like terms: 0 + 0.5625 = 0.5625
t + t2 = 0.5625

The t term is t.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
 + 0.25 + t2 = 0.5625 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + t2 = 0.5625 + 0.25

Combine like terms: 0.5625 + 0.25 = 0.8125
1.25 + t2 = 0.8125

Factor a perfect square on the left side:
(t + 0.5)(t + 0.5) = 0.8125

Calculate the square root of the right side: 0.901387819

Break this problem into two subproblems by setting 
(t + 0.5) equal to 0.901387819 and -0.901387819.

Subproblem 1

t + 0.5 = 0.901387819 Simplifying t + 0.5 = 0.901387819 Reorder the terms: 0.5 + t = 0.901387819 Solving 0.5 + t = 0.901387819 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + t = 0.901387819 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + t = 0.901387819 + -0.5 t = 0.901387819 + -0.5 Combine like terms: 0.901387819 + -0.5 = 0.401387819 t = 0.401387819 Simplifying t = 0.401387819

Subproblem 2

t + 0.5 = -0.901387819 Simplifying t + 0.5 = -0.901387819 Reorder the terms: 0.5 + t = -0.901387819 Solving 0.5 + t = -0.901387819 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + t = -0.901387819 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + t = -0.901387819 + -0.5 t = -0.901387819 + -0.5 Combine like terms: -0.901387819 + -0.5 = -1.401387819 t = -1.401387819 Simplifying t = -1.401387819

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.401387819, -1.401387819}

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