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

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


Simplifying
-16t2 + 30t + 105 = 0

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

Solving
105 + 30t + -16t2 = 0

Solving for variable 't'.

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

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

Move the constant term to the right:

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

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

Combine like terms: -6.5625 + 6.5625 = 0.0000
0.0000 + -1.875t + t2 = 0 + 6.5625
-1.875t + t2 = 0 + 6.5625

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

The t term is -1.875t.  Take half its coefficient (-0.9375).
Square it (0.87890625) and add it to both sides.

Add '0.87890625' to each side of the equation.
-1.875t + 0.87890625 + t2 = 6.5625 + 0.87890625

Reorder the terms:
0.87890625 + -1.875t + t2 = 6.5625 + 0.87890625

Combine like terms: 6.5625 + 0.87890625 = 7.44140625
0.87890625 + -1.875t + t2 = 7.44140625

Factor a perfect square on the left side:
(t + -0.9375)(t + -0.9375) = 7.44140625

Calculate the square root of the right side: 2.727894105

Break this problem into two subproblems by setting 
(t + -0.9375) equal to 2.727894105 and -2.727894105.

Subproblem 1

t + -0.9375 = 2.727894105 Simplifying t + -0.9375 = 2.727894105 Reorder the terms: -0.9375 + t = 2.727894105 Solving -0.9375 + t = 2.727894105 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.9375' to each side of the equation. -0.9375 + 0.9375 + t = 2.727894105 + 0.9375 Combine like terms: -0.9375 + 0.9375 = 0.0000 0.0000 + t = 2.727894105 + 0.9375 t = 2.727894105 + 0.9375 Combine like terms: 2.727894105 + 0.9375 = 3.665394105 t = 3.665394105 Simplifying t = 3.665394105

Subproblem 2

t + -0.9375 = -2.727894105 Simplifying t + -0.9375 = -2.727894105 Reorder the terms: -0.9375 + t = -2.727894105 Solving -0.9375 + t = -2.727894105 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.9375' to each side of the equation. -0.9375 + 0.9375 + t = -2.727894105 + 0.9375 Combine like terms: -0.9375 + 0.9375 = 0.0000 0.0000 + t = -2.727894105 + 0.9375 t = -2.727894105 + 0.9375 Combine like terms: -2.727894105 + 0.9375 = -1.790394105 t = -1.790394105 Simplifying t = -1.790394105

Solution

The solution to the problem is based on the solutions from the subproblems. t = {3.665394105, -1.790394105}

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