3t^2+3t-80=0

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Solution for 3t^2+3t-80=0 equation:


Simplifying
3t2 + 3t + -80 = 0

Reorder the terms:
-80 + 3t + 3t2 = 0

Solving
-80 + 3t + 3t2 = 0

Solving for variable 't'.

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

Divide each side by '3'.
-26.66666667 + t + t2 = 0

Move the constant term to the right:

Add '26.66666667' to each side of the equation.
-26.66666667 + t + 26.66666667 + t2 = 0 + 26.66666667

Reorder the terms:
-26.66666667 + 26.66666667 + t + t2 = 0 + 26.66666667

Combine like terms: -26.66666667 + 26.66666667 = 0.00000000
0.00000000 + t + t2 = 0 + 26.66666667
t + t2 = 0 + 26.66666667

Combine like terms: 0 + 26.66666667 = 26.66666667
t + t2 = 26.66666667

The t term is t.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
 + 0.25 + t2 = 26.66666667 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + t2 = 26.66666667 + 0.25

Combine like terms: 26.66666667 + 0.25 = 26.91666667
1.25 + t2 = 26.91666667

Factor a perfect square on the left side:
(t + 0.5)(t + 0.5) = 26.91666667

Calculate the square root of the right side: 5.188127472

Break this problem into two subproblems by setting 
(t + 0.5) equal to 5.188127472 and -5.188127472.

Subproblem 1

t + 0.5 = 5.188127472 Simplifying t + 0.5 = 5.188127472 Reorder the terms: 0.5 + t = 5.188127472 Solving 0.5 + t = 5.188127472 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + t = 5.188127472 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + t = 5.188127472 + -0.5 t = 5.188127472 + -0.5 Combine like terms: 5.188127472 + -0.5 = 4.688127472 t = 4.688127472 Simplifying t = 4.688127472

Subproblem 2

t + 0.5 = -5.188127472 Simplifying t + 0.5 = -5.188127472 Reorder the terms: 0.5 + t = -5.188127472 Solving 0.5 + t = -5.188127472 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + t = -5.188127472 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + t = -5.188127472 + -0.5 t = -5.188127472 + -0.5 Combine like terms: -5.188127472 + -0.5 = -5.688127472 t = -5.688127472 Simplifying t = -5.688127472

Solution

The solution to the problem is based on the solutions from the subproblems. t = {4.688127472, -5.688127472}

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