0=6t^2-10t-9

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Solution for 0=6t^2-10t-9 equation:


Simplifying
0 = 6t2 + -10t + -9

Reorder the terms:
0 = -9 + -10t + 6t2

Solving
0 = -9 + -10t + 6t2

Solving for variable 't'.

Combine like terms: 0 + 9 = 9
9 + 10t + -6t2 = -9 + -10t + 6t2 + 9 + 10t + -6t2

Reorder the terms:
9 + 10t + -6t2 = -9 + 9 + -10t + 10t + 6t2 + -6t2

Combine like terms: -9 + 9 = 0
9 + 10t + -6t2 = 0 + -10t + 10t + 6t2 + -6t2
9 + 10t + -6t2 = -10t + 10t + 6t2 + -6t2

Combine like terms: -10t + 10t = 0
9 + 10t + -6t2 = 0 + 6t2 + -6t2
9 + 10t + -6t2 = 6t2 + -6t2

Combine like terms: 6t2 + -6t2 = 0
9 + 10t + -6t2 = 0

Begin completing the square.  Divide all terms by
-6 the coefficient of the squared term: 

Divide each side by '-6'.
-1.5 + -1.666666667t + t2 = 0

Move the constant term to the right:

Add '1.5' to each side of the equation.
-1.5 + -1.666666667t + 1.5 + t2 = 0 + 1.5

Reorder the terms:
-1.5 + 1.5 + -1.666666667t + t2 = 0 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
0.0 + -1.666666667t + t2 = 0 + 1.5
-1.666666667t + t2 = 0 + 1.5

Combine like terms: 0 + 1.5 = 1.5
-1.666666667t + t2 = 1.5

The t term is -1.666666667t.  Take half its coefficient (-0.8333333335).
Square it (0.6944444447) and add it to both sides.

Add '0.6944444447' to each side of the equation.
-1.666666667t + 0.6944444447 + t2 = 1.5 + 0.6944444447

Reorder the terms:
0.6944444447 + -1.666666667t + t2 = 1.5 + 0.6944444447

Combine like terms: 1.5 + 0.6944444447 = 2.1944444447
0.6944444447 + -1.666666667t + t2 = 2.1944444447

Factor a perfect square on the left side:
(t + -0.8333333335)(t + -0.8333333335) = 2.1944444447

Calculate the square root of the right side: 1.481365736

Break this problem into two subproblems by setting 
(t + -0.8333333335) equal to 1.481365736 and -1.481365736.

Subproblem 1

t + -0.8333333335 = 1.481365736 Simplifying t + -0.8333333335 = 1.481365736 Reorder the terms: -0.8333333335 + t = 1.481365736 Solving -0.8333333335 + t = 1.481365736 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.8333333335' to each side of the equation. -0.8333333335 + 0.8333333335 + t = 1.481365736 + 0.8333333335 Combine like terms: -0.8333333335 + 0.8333333335 = 0.0000000000 0.0000000000 + t = 1.481365736 + 0.8333333335 t = 1.481365736 + 0.8333333335 Combine like terms: 1.481365736 + 0.8333333335 = 2.3146990695 t = 2.3146990695 Simplifying t = 2.3146990695

Subproblem 2

t + -0.8333333335 = -1.481365736 Simplifying t + -0.8333333335 = -1.481365736 Reorder the terms: -0.8333333335 + t = -1.481365736 Solving -0.8333333335 + t = -1.481365736 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.8333333335' to each side of the equation. -0.8333333335 + 0.8333333335 + t = -1.481365736 + 0.8333333335 Combine like terms: -0.8333333335 + 0.8333333335 = 0.0000000000 0.0000000000 + t = -1.481365736 + 0.8333333335 t = -1.481365736 + 0.8333333335 Combine like terms: -1.481365736 + 0.8333333335 = -0.6480324025 t = -0.6480324025 Simplifying t = -0.6480324025

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.3146990695, -0.6480324025}

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