0=5t^2-4t-3

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Solution for 0=5t^2-4t-3 equation:


Simplifying
0 = 5t2 + -4t + -3

Reorder the terms:
0 = -3 + -4t + 5t2

Solving
0 = -3 + -4t + 5t2

Solving for variable 't'.

Combine like terms: 0 + 3 = 3
3 + 4t + -5t2 = -3 + -4t + 5t2 + 3 + 4t + -5t2

Reorder the terms:
3 + 4t + -5t2 = -3 + 3 + -4t + 4t + 5t2 + -5t2

Combine like terms: -3 + 3 = 0
3 + 4t + -5t2 = 0 + -4t + 4t + 5t2 + -5t2
3 + 4t + -5t2 = -4t + 4t + 5t2 + -5t2

Combine like terms: -4t + 4t = 0
3 + 4t + -5t2 = 0 + 5t2 + -5t2
3 + 4t + -5t2 = 5t2 + -5t2

Combine like terms: 5t2 + -5t2 = 0
3 + 4t + -5t2 = 0

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

Divide each side by '-5'.
-0.6 + -0.8t + t2 = 0

Move the constant term to the right:

Add '0.6' to each side of the equation.
-0.6 + -0.8t + 0.6 + t2 = 0 + 0.6

Reorder the terms:
-0.6 + 0.6 + -0.8t + t2 = 0 + 0.6

Combine like terms: -0.6 + 0.6 = 0.0
0.0 + -0.8t + t2 = 0 + 0.6
-0.8t + t2 = 0 + 0.6

Combine like terms: 0 + 0.6 = 0.6
-0.8t + t2 = 0.6

The t term is -0.8t.  Take half its coefficient (-0.4).
Square it (0.16) and add it to both sides.

Add '0.16' to each side of the equation.
-0.8t + 0.16 + t2 = 0.6 + 0.16

Reorder the terms:
0.16 + -0.8t + t2 = 0.6 + 0.16

Combine like terms: 0.6 + 0.16 = 0.76
0.16 + -0.8t + t2 = 0.76

Factor a perfect square on the left side:
(t + -0.4)(t + -0.4) = 0.76

Calculate the square root of the right side: 0.871779789

Break this problem into two subproblems by setting 
(t + -0.4) equal to 0.871779789 and -0.871779789.

Subproblem 1

t + -0.4 = 0.871779789 Simplifying t + -0.4 = 0.871779789 Reorder the terms: -0.4 + t = 0.871779789 Solving -0.4 + t = 0.871779789 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.4' to each side of the equation. -0.4 + 0.4 + t = 0.871779789 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + t = 0.871779789 + 0.4 t = 0.871779789 + 0.4 Combine like terms: 0.871779789 + 0.4 = 1.271779789 t = 1.271779789 Simplifying t = 1.271779789

Subproblem 2

t + -0.4 = -0.871779789 Simplifying t + -0.4 = -0.871779789 Reorder the terms: -0.4 + t = -0.871779789 Solving -0.4 + t = -0.871779789 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.4' to each side of the equation. -0.4 + 0.4 + t = -0.871779789 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + t = -0.871779789 + 0.4 t = -0.871779789 + 0.4 Combine like terms: -0.871779789 + 0.4 = -0.471779789 t = -0.471779789 Simplifying t = -0.471779789

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.271779789, -0.471779789}

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