0=-16t^2-11t+120

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Solution for 0=-16t^2-11t+120 equation:


Simplifying
0 = -16t2 + -11t + 120

Reorder the terms:
0 = 120 + -11t + -16t2

Solving
0 = 120 + -11t + -16t2

Solving for variable 't'.

Combine like terms: 0 + -120 = -120
-120 + 11t + 16t2 = 120 + -11t + -16t2 + -120 + 11t + 16t2

Reorder the terms:
-120 + 11t + 16t2 = 120 + -120 + -11t + 11t + -16t2 + 16t2

Combine like terms: 120 + -120 = 0
-120 + 11t + 16t2 = 0 + -11t + 11t + -16t2 + 16t2
-120 + 11t + 16t2 = -11t + 11t + -16t2 + 16t2

Combine like terms: -11t + 11t = 0
-120 + 11t + 16t2 = 0 + -16t2 + 16t2
-120 + 11t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
-120 + 11t + 16t2 = 0

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

Divide each side by '16'.
-7.5 + 0.6875t + t2 = 0

Move the constant term to the right:

Add '7.5' to each side of the equation.
-7.5 + 0.6875t + 7.5 + t2 = 0 + 7.5

Reorder the terms:
-7.5 + 7.5 + 0.6875t + t2 = 0 + 7.5

Combine like terms: -7.5 + 7.5 = 0.0
0.0 + 0.6875t + t2 = 0 + 7.5
0.6875t + t2 = 0 + 7.5

Combine like terms: 0 + 7.5 = 7.5
0.6875t + t2 = 7.5

The t term is 0.6875t.  Take half its coefficient (0.34375).
Square it (0.1181640625) and add it to both sides.

Add '0.1181640625' to each side of the equation.
0.6875t + 0.1181640625 + t2 = 7.5 + 0.1181640625

Reorder the terms:
0.1181640625 + 0.6875t + t2 = 7.5 + 0.1181640625

Combine like terms: 7.5 + 0.1181640625 = 7.6181640625
0.1181640625 + 0.6875t + t2 = 7.6181640625

Factor a perfect square on the left side:
(t + 0.34375)(t + 0.34375) = 7.6181640625

Calculate the square root of the right side: 2.760102183

Break this problem into two subproblems by setting 
(t + 0.34375) equal to 2.760102183 and -2.760102183.

Subproblem 1

t + 0.34375 = 2.760102183 Simplifying t + 0.34375 = 2.760102183 Reorder the terms: 0.34375 + t = 2.760102183 Solving 0.34375 + t = 2.760102183 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.34375' to each side of the equation. 0.34375 + -0.34375 + t = 2.760102183 + -0.34375 Combine like terms: 0.34375 + -0.34375 = 0.00000 0.00000 + t = 2.760102183 + -0.34375 t = 2.760102183 + -0.34375 Combine like terms: 2.760102183 + -0.34375 = 2.416352183 t = 2.416352183 Simplifying t = 2.416352183

Subproblem 2

t + 0.34375 = -2.760102183 Simplifying t + 0.34375 = -2.760102183 Reorder the terms: 0.34375 + t = -2.760102183 Solving 0.34375 + t = -2.760102183 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.34375' to each side of the equation. 0.34375 + -0.34375 + t = -2.760102183 + -0.34375 Combine like terms: 0.34375 + -0.34375 = 0.00000 0.00000 + t = -2.760102183 + -0.34375 t = -2.760102183 + -0.34375 Combine like terms: -2.760102183 + -0.34375 = -3.103852183 t = -3.103852183 Simplifying t = -3.103852183

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.416352183, -3.103852183}

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