0=-5t^2+24t-20

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Solution for 0=-5t^2+24t-20 equation:


Simplifying
0 = -5t2 + 24t + -20

Reorder the terms:
0 = -20 + 24t + -5t2

Solving
0 = -20 + 24t + -5t2

Solving for variable 't'.

Combine like terms: 0 + 20 = 20
20 + -24t + 5t2 = -20 + 24t + -5t2 + 20 + -24t + 5t2

Reorder the terms:
20 + -24t + 5t2 = -20 + 20 + 24t + -24t + -5t2 + 5t2

Combine like terms: -20 + 20 = 0
20 + -24t + 5t2 = 0 + 24t + -24t + -5t2 + 5t2
20 + -24t + 5t2 = 24t + -24t + -5t2 + 5t2

Combine like terms: 24t + -24t = 0
20 + -24t + 5t2 = 0 + -5t2 + 5t2
20 + -24t + 5t2 = -5t2 + 5t2

Combine like terms: -5t2 + 5t2 = 0
20 + -24t + 5t2 = 0

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

Divide each side by '5'.
4 + -4.8t + t2 = 0

Move the constant term to the right:

Add '-4' to each side of the equation.
4 + -4.8t + -4 + t2 = 0 + -4

Reorder the terms:
4 + -4 + -4.8t + t2 = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -4.8t + t2 = 0 + -4
-4.8t + t2 = 0 + -4

Combine like terms: 0 + -4 = -4
-4.8t + t2 = -4

The t term is -4.8t.  Take half its coefficient (-2.4).
Square it (5.76) and add it to both sides.

Add '5.76' to each side of the equation.
-4.8t + 5.76 + t2 = -4 + 5.76

Reorder the terms:
5.76 + -4.8t + t2 = -4 + 5.76

Combine like terms: -4 + 5.76 = 1.76
5.76 + -4.8t + t2 = 1.76

Factor a perfect square on the left side:
(t + -2.4)(t + -2.4) = 1.76

Calculate the square root of the right side: 1.326649916

Break this problem into two subproblems by setting 
(t + -2.4) equal to 1.326649916 and -1.326649916.

Subproblem 1

t + -2.4 = 1.326649916 Simplifying t + -2.4 = 1.326649916 Reorder the terms: -2.4 + t = 1.326649916 Solving -2.4 + t = 1.326649916 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.4' to each side of the equation. -2.4 + 2.4 + t = 1.326649916 + 2.4 Combine like terms: -2.4 + 2.4 = 0.0 0.0 + t = 1.326649916 + 2.4 t = 1.326649916 + 2.4 Combine like terms: 1.326649916 + 2.4 = 3.726649916 t = 3.726649916 Simplifying t = 3.726649916

Subproblem 2

t + -2.4 = -1.326649916 Simplifying t + -2.4 = -1.326649916 Reorder the terms: -2.4 + t = -1.326649916 Solving -2.4 + t = -1.326649916 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.4' to each side of the equation. -2.4 + 2.4 + t = -1.326649916 + 2.4 Combine like terms: -2.4 + 2.4 = 0.0 0.0 + t = -1.326649916 + 2.4 t = -1.326649916 + 2.4 Combine like terms: -1.326649916 + 2.4 = 1.073350084 t = 1.073350084 Simplifying t = 1.073350084

Solution

The solution to the problem is based on the solutions from the subproblems. t = {3.726649916, 1.073350084}

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