0=-16t^2+105t+30

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Solution for 0=-16t^2+105t+30 equation:


Simplifying
0 = -16t2 + 105t + 30

Reorder the terms:
0 = 30 + 105t + -16t2

Solving
0 = 30 + 105t + -16t2

Solving for variable 't'.

Combine like terms: 0 + -30 = -30
-30 + -105t + 16t2 = 30 + 105t + -16t2 + -30 + -105t + 16t2

Reorder the terms:
-30 + -105t + 16t2 = 30 + -30 + 105t + -105t + -16t2 + 16t2

Combine like terms: 30 + -30 = 0
-30 + -105t + 16t2 = 0 + 105t + -105t + -16t2 + 16t2
-30 + -105t + 16t2 = 105t + -105t + -16t2 + 16t2

Combine like terms: 105t + -105t = 0
-30 + -105t + 16t2 = 0 + -16t2 + 16t2
-30 + -105t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
-30 + -105t + 16t2 = 0

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

Divide each side by '16'.
-1.875 + -6.5625t + t2 = 0

Move the constant term to the right:

Add '1.875' to each side of the equation.
-1.875 + -6.5625t + 1.875 + t2 = 0 + 1.875

Reorder the terms:
-1.875 + 1.875 + -6.5625t + t2 = 0 + 1.875

Combine like terms: -1.875 + 1.875 = 0.000
0.000 + -6.5625t + t2 = 0 + 1.875
-6.5625t + t2 = 0 + 1.875

Combine like terms: 0 + 1.875 = 1.875
-6.5625t + t2 = 1.875

The t term is -6.5625t.  Take half its coefficient (-3.28125).
Square it (10.76660156) and add it to both sides.

Add '10.76660156' to each side of the equation.
-6.5625t + 10.76660156 + t2 = 1.875 + 10.76660156

Reorder the terms:
10.76660156 + -6.5625t + t2 = 1.875 + 10.76660156

Combine like terms: 1.875 + 10.76660156 = 12.64160156
10.76660156 + -6.5625t + t2 = 12.64160156

Factor a perfect square on the left side:
(t + -3.28125)(t + -3.28125) = 12.64160156

Calculate the square root of the right side: 3.555502997

Break this problem into two subproblems by setting 
(t + -3.28125) equal to 3.555502997 and -3.555502997.

Subproblem 1

t + -3.28125 = 3.555502997 Simplifying t + -3.28125 = 3.555502997 Reorder the terms: -3.28125 + t = 3.555502997 Solving -3.28125 + t = 3.555502997 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.28125' to each side of the equation. -3.28125 + 3.28125 + t = 3.555502997 + 3.28125 Combine like terms: -3.28125 + 3.28125 = 0.00000 0.00000 + t = 3.555502997 + 3.28125 t = 3.555502997 + 3.28125 Combine like terms: 3.555502997 + 3.28125 = 6.836752997 t = 6.836752997 Simplifying t = 6.836752997

Subproblem 2

t + -3.28125 = -3.555502997 Simplifying t + -3.28125 = -3.555502997 Reorder the terms: -3.28125 + t = -3.555502997 Solving -3.28125 + t = -3.555502997 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.28125' to each side of the equation. -3.28125 + 3.28125 + t = -3.555502997 + 3.28125 Combine like terms: -3.28125 + 3.28125 = 0.00000 0.00000 + t = -3.555502997 + 3.28125 t = -3.555502997 + 3.28125 Combine like terms: -3.555502997 + 3.28125 = -0.274252997 t = -0.274252997 Simplifying t = -0.274252997

Solution

The solution to the problem is based on the solutions from the subproblems. t = {6.836752997, -0.274252997}

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