0=-16t^2+125t+30

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Solution for 0=-16t^2+125t+30 equation:


Simplifying
0 = -16t2 + 125t + 30

Reorder the terms:
0 = 30 + 125t + -16t2

Solving
0 = 30 + 125t + -16t2

Solving for variable 't'.

Combine like terms: 0 + -30 = -30
-30 + -125t + 16t2 = 30 + 125t + -16t2 + -30 + -125t + 16t2

Reorder the terms:
-30 + -125t + 16t2 = 30 + -30 + 125t + -125t + -16t2 + 16t2

Combine like terms: 30 + -30 = 0
-30 + -125t + 16t2 = 0 + 125t + -125t + -16t2 + 16t2
-30 + -125t + 16t2 = 125t + -125t + -16t2 + 16t2

Combine like terms: 125t + -125t = 0
-30 + -125t + 16t2 = 0 + -16t2 + 16t2
-30 + -125t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
-30 + -125t + 16t2 = 0

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

Divide each side by '16'.
-1.875 + -7.8125t + t2 = 0

Move the constant term to the right:

Add '1.875' to each side of the equation.
-1.875 + -7.8125t + 1.875 + t2 = 0 + 1.875

Reorder the terms:
-1.875 + 1.875 + -7.8125t + t2 = 0 + 1.875

Combine like terms: -1.875 + 1.875 = 0.000
0.000 + -7.8125t + t2 = 0 + 1.875
-7.8125t + t2 = 0 + 1.875

Combine like terms: 0 + 1.875 = 1.875
-7.8125t + t2 = 1.875

The t term is -7.8125t.  Take half its coefficient (-3.90625).
Square it (15.25878906) and add it to both sides.

Add '15.25878906' to each side of the equation.
-7.8125t + 15.25878906 + t2 = 1.875 + 15.25878906

Reorder the terms:
15.25878906 + -7.8125t + t2 = 1.875 + 15.25878906

Combine like terms: 1.875 + 15.25878906 = 17.13378906
15.25878906 + -7.8125t + t2 = 17.13378906

Factor a perfect square on the left side:
(t + -3.90625)(t + -3.90625) = 17.13378906

Calculate the square root of the right side: 4.139298136

Break this problem into two subproblems by setting 
(t + -3.90625) equal to 4.139298136 and -4.139298136.

Subproblem 1

t + -3.90625 = 4.139298136 Simplifying t + -3.90625 = 4.139298136 Reorder the terms: -3.90625 + t = 4.139298136 Solving -3.90625 + t = 4.139298136 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.90625' to each side of the equation. -3.90625 + 3.90625 + t = 4.139298136 + 3.90625 Combine like terms: -3.90625 + 3.90625 = 0.00000 0.00000 + t = 4.139298136 + 3.90625 t = 4.139298136 + 3.90625 Combine like terms: 4.139298136 + 3.90625 = 8.045548136 t = 8.045548136 Simplifying t = 8.045548136

Subproblem 2

t + -3.90625 = -4.139298136 Simplifying t + -3.90625 = -4.139298136 Reorder the terms: -3.90625 + t = -4.139298136 Solving -3.90625 + t = -4.139298136 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.90625' to each side of the equation. -3.90625 + 3.90625 + t = -4.139298136 + 3.90625 Combine like terms: -3.90625 + 3.90625 = 0.00000 0.00000 + t = -4.139298136 + 3.90625 t = -4.139298136 + 3.90625 Combine like terms: -4.139298136 + 3.90625 = -0.233048136 t = -0.233048136 Simplifying t = -0.233048136

Solution

The solution to the problem is based on the solutions from the subproblems. t = {8.045548136, -0.233048136}

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