0=-16t^2+30t+135

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Solution for 0=-16t^2+30t+135 equation:


Simplifying
0 = -16t2 + 30t + 135

Reorder the terms:
0 = 135 + 30t + -16t2

Solving
0 = 135 + 30t + -16t2

Solving for variable 't'.

Combine like terms: 0 + -135 = -135
-135 + -30t + 16t2 = 135 + 30t + -16t2 + -135 + -30t + 16t2

Reorder the terms:
-135 + -30t + 16t2 = 135 + -135 + 30t + -30t + -16t2 + 16t2

Combine like terms: 135 + -135 = 0
-135 + -30t + 16t2 = 0 + 30t + -30t + -16t2 + 16t2
-135 + -30t + 16t2 = 30t + -30t + -16t2 + 16t2

Combine like terms: 30t + -30t = 0
-135 + -30t + 16t2 = 0 + -16t2 + 16t2
-135 + -30t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
-135 + -30t + 16t2 = 0

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

Divide each side by '16'.
-8.4375 + -1.875t + t2 = 0

Move the constant term to the right:

Add '8.4375' to each side of the equation.
-8.4375 + -1.875t + 8.4375 + t2 = 0 + 8.4375

Reorder the terms:
-8.4375 + 8.4375 + -1.875t + t2 = 0 + 8.4375

Combine like terms: -8.4375 + 8.4375 = 0.0000
0.0000 + -1.875t + t2 = 0 + 8.4375
-1.875t + t2 = 0 + 8.4375

Combine like terms: 0 + 8.4375 = 8.4375
-1.875t + t2 = 8.4375

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 = 8.4375 + 0.87890625

Reorder the terms:
0.87890625 + -1.875t + t2 = 8.4375 + 0.87890625

Combine like terms: 8.4375 + 0.87890625 = 9.31640625
0.87890625 + -1.875t + t2 = 9.31640625

Factor a perfect square on the left side:
(t + -0.9375)(t + -0.9375) = 9.31640625

Calculate the square root of the right side: 3.052278862

Break this problem into two subproblems by setting 
(t + -0.9375) equal to 3.052278862 and -3.052278862.

Subproblem 1

t + -0.9375 = 3.052278862 Simplifying t + -0.9375 = 3.052278862 Reorder the terms: -0.9375 + t = 3.052278862 Solving -0.9375 + t = 3.052278862 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 = 3.052278862 + 0.9375 Combine like terms: -0.9375 + 0.9375 = 0.0000 0.0000 + t = 3.052278862 + 0.9375 t = 3.052278862 + 0.9375 Combine like terms: 3.052278862 + 0.9375 = 3.989778862 t = 3.989778862 Simplifying t = 3.989778862

Subproblem 2

t + -0.9375 = -3.052278862 Simplifying t + -0.9375 = -3.052278862 Reorder the terms: -0.9375 + t = -3.052278862 Solving -0.9375 + t = -3.052278862 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 = -3.052278862 + 0.9375 Combine like terms: -0.9375 + 0.9375 = 0.0000 0.0000 + t = -3.052278862 + 0.9375 t = -3.052278862 + 0.9375 Combine like terms: -3.052278862 + 0.9375 = -2.114778862 t = -2.114778862 Simplifying t = -2.114778862

Solution

The solution to the problem is based on the solutions from the subproblems. t = {3.989778862, -2.114778862}

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