0=4t^2-13t-10

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Solution for 0=4t^2-13t-10 equation:


Simplifying
0 = 4t2 + -13t + -10

Reorder the terms:
0 = -10 + -13t + 4t2

Solving
0 = -10 + -13t + 4t2

Solving for variable 't'.

Combine like terms: 0 + 10 = 10
10 + 13t + -4t2 = -10 + -13t + 4t2 + 10 + 13t + -4t2

Reorder the terms:
10 + 13t + -4t2 = -10 + 10 + -13t + 13t + 4t2 + -4t2

Combine like terms: -10 + 10 = 0
10 + 13t + -4t2 = 0 + -13t + 13t + 4t2 + -4t2
10 + 13t + -4t2 = -13t + 13t + 4t2 + -4t2

Combine like terms: -13t + 13t = 0
10 + 13t + -4t2 = 0 + 4t2 + -4t2
10 + 13t + -4t2 = 4t2 + -4t2

Combine like terms: 4t2 + -4t2 = 0
10 + 13t + -4t2 = 0

Begin completing the square.  Divide all terms by
-4 the coefficient of the squared term: 

Divide each side by '-4'.
-2.5 + -3.25t + t2 = 0

Move the constant term to the right:

Add '2.5' to each side of the equation.
-2.5 + -3.25t + 2.5 + t2 = 0 + 2.5

Reorder the terms:
-2.5 + 2.5 + -3.25t + t2 = 0 + 2.5

Combine like terms: -2.5 + 2.5 = 0.0
0.0 + -3.25t + t2 = 0 + 2.5
-3.25t + t2 = 0 + 2.5

Combine like terms: 0 + 2.5 = 2.5
-3.25t + t2 = 2.5

The t term is -3.25t.  Take half its coefficient (-1.625).
Square it (2.640625) and add it to both sides.

Add '2.640625' to each side of the equation.
-3.25t + 2.640625 + t2 = 2.5 + 2.640625

Reorder the terms:
2.640625 + -3.25t + t2 = 2.5 + 2.640625

Combine like terms: 2.5 + 2.640625 = 5.140625
2.640625 + -3.25t + t2 = 5.140625

Factor a perfect square on the left side:
(t + -1.625)(t + -1.625) = 5.140625

Calculate the square root of the right side: 2.267294643

Break this problem into two subproblems by setting 
(t + -1.625) equal to 2.267294643 and -2.267294643.

Subproblem 1

t + -1.625 = 2.267294643 Simplifying t + -1.625 = 2.267294643 Reorder the terms: -1.625 + t = 2.267294643 Solving -1.625 + t = 2.267294643 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.625' to each side of the equation. -1.625 + 1.625 + t = 2.267294643 + 1.625 Combine like terms: -1.625 + 1.625 = 0.000 0.000 + t = 2.267294643 + 1.625 t = 2.267294643 + 1.625 Combine like terms: 2.267294643 + 1.625 = 3.892294643 t = 3.892294643 Simplifying t = 3.892294643

Subproblem 2

t + -1.625 = -2.267294643 Simplifying t + -1.625 = -2.267294643 Reorder the terms: -1.625 + t = -2.267294643 Solving -1.625 + t = -2.267294643 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.625' to each side of the equation. -1.625 + 1.625 + t = -2.267294643 + 1.625 Combine like terms: -1.625 + 1.625 = 0.000 0.000 + t = -2.267294643 + 1.625 t = -2.267294643 + 1.625 Combine like terms: -2.267294643 + 1.625 = -0.642294643 t = -0.642294643 Simplifying t = -0.642294643

Solution

The solution to the problem is based on the solutions from the subproblems. t = {3.892294643, -0.642294643}

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