-5t^2+20t-14.4=0

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Solution for -5t^2+20t-14.4=0 equation:


Simplifying
-5t2 + 20t + -14.4 = 0

Reorder the terms:
-14.4 + 20t + -5t2 = 0

Solving
-14.4 + 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'.
2.88 + -4t + t2 = 0

Move the constant term to the right:

Add '-2.88' to each side of the equation.
2.88 + -4t + -2.88 + t2 = 0 + -2.88

Reorder the terms:
2.88 + -2.88 + -4t + t2 = 0 + -2.88

Combine like terms: 2.88 + -2.88 = 0.00
0.00 + -4t + t2 = 0 + -2.88
-4t + t2 = 0 + -2.88

Combine like terms: 0 + -2.88 = -2.88
-4t + t2 = -2.88

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 = -2.88 + 4

Reorder the terms:
4 + -4t + t2 = -2.88 + 4

Combine like terms: -2.88 + 4 = 1.12
4 + -4t + t2 = 1.12

Factor a perfect square on the left side:
(t + -2)(t + -2) = 1.12

Calculate the square root of the right side: 1.058300524

Break this problem into two subproblems by setting 
(t + -2) equal to 1.058300524 and -1.058300524.

Subproblem 1

t + -2 = 1.058300524 Simplifying t + -2 = 1.058300524 Reorder the terms: -2 + t = 1.058300524 Solving -2 + t = 1.058300524 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 = 1.058300524 + 2 Combine like terms: -2 + 2 = 0 0 + t = 1.058300524 + 2 t = 1.058300524 + 2 Combine like terms: 1.058300524 + 2 = 3.058300524 t = 3.058300524 Simplifying t = 3.058300524

Subproblem 2

t + -2 = -1.058300524 Simplifying t + -2 = -1.058300524 Reorder the terms: -2 + t = -1.058300524 Solving -2 + t = -1.058300524 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 = -1.058300524 + 2 Combine like terms: -2 + 2 = 0 0 + t = -1.058300524 + 2 t = -1.058300524 + 2 Combine like terms: -1.058300524 + 2 = 0.941699476 t = 0.941699476 Simplifying t = 0.941699476

Solution

The solution to the problem is based on the solutions from the subproblems. t = {3.058300524, 0.941699476}

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