-5t^2-20t+96=0

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Solution for -5t^2-20t+96=0 equation:


Simplifying
-5t2 + -20t + 96 = 0

Reorder the terms:
96 + -20t + -5t2 = 0

Solving
96 + -20t + -5t2 = 0

Solving for variable 't'.

Begin completing the square.  Divide all terms by
-5 the coefficient of the squared term: 

Divide each side by '-5'.
-19.2 + 4t + t2 = 0

Move the constant term to the right:

Add '19.2' to each side of the equation.
-19.2 + 4t + 19.2 + t2 = 0 + 19.2

Reorder the terms:
-19.2 + 19.2 + 4t + t2 = 0 + 19.2

Combine like terms: -19.2 + 19.2 = 0.0
0.0 + 4t + t2 = 0 + 19.2
4t + t2 = 0 + 19.2

Combine like terms: 0 + 19.2 = 19.2
4t + t2 = 19.2

The t term is 4t.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4t + 4 + t2 = 19.2 + 4

Reorder the terms:
4 + 4t + t2 = 19.2 + 4

Combine like terms: 19.2 + 4 = 23.2
4 + 4t + t2 = 23.2

Factor a perfect square on the left side:
(t + 2)(t + 2) = 23.2

Calculate the square root of the right side: 4.816637832

Break this problem into two subproblems by setting 
(t + 2) equal to 4.816637832 and -4.816637832.

Subproblem 1

t + 2 = 4.816637832 Simplifying t + 2 = 4.816637832 Reorder the terms: 2 + t = 4.816637832 Solving 2 + t = 4.816637832 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + t = 4.816637832 + -2 Combine like terms: 2 + -2 = 0 0 + t = 4.816637832 + -2 t = 4.816637832 + -2 Combine like terms: 4.816637832 + -2 = 2.816637832 t = 2.816637832 Simplifying t = 2.816637832

Subproblem 2

t + 2 = -4.816637832 Simplifying t + 2 = -4.816637832 Reorder the terms: 2 + t = -4.816637832 Solving 2 + t = -4.816637832 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + t = -4.816637832 + -2 Combine like terms: 2 + -2 = 0 0 + t = -4.816637832 + -2 t = -4.816637832 + -2 Combine like terms: -4.816637832 + -2 = -6.816637832 t = -6.816637832 Simplifying t = -6.816637832

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.816637832, -6.816637832}

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