0=-5t^2+30t+6

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Solution for 0=-5t^2+30t+6 equation:


Simplifying
0 = -5t2 + 30t + 6

Reorder the terms:
0 = 6 + 30t + -5t2

Solving
0 = 6 + 30t + -5t2

Solving for variable 't'.

Combine like terms: 0 + -6 = -6
-6 + -30t + 5t2 = 6 + 30t + -5t2 + -6 + -30t + 5t2

Reorder the terms:
-6 + -30t + 5t2 = 6 + -6 + 30t + -30t + -5t2 + 5t2

Combine like terms: 6 + -6 = 0
-6 + -30t + 5t2 = 0 + 30t + -30t + -5t2 + 5t2
-6 + -30t + 5t2 = 30t + -30t + -5t2 + 5t2

Combine like terms: 30t + -30t = 0
-6 + -30t + 5t2 = 0 + -5t2 + 5t2
-6 + -30t + 5t2 = -5t2 + 5t2

Combine like terms: -5t2 + 5t2 = 0
-6 + -30t + 5t2 = 0

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

Divide each side by '5'.
-1.2 + -6t + t2 = 0

Move the constant term to the right:

Add '1.2' to each side of the equation.
-1.2 + -6t + 1.2 + t2 = 0 + 1.2

Reorder the terms:
-1.2 + 1.2 + -6t + t2 = 0 + 1.2

Combine like terms: -1.2 + 1.2 = 0.0
0.0 + -6t + t2 = 0 + 1.2
-6t + t2 = 0 + 1.2

Combine like terms: 0 + 1.2 = 1.2
-6t + t2 = 1.2

The t term is -6t.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6t + 9 + t2 = 1.2 + 9

Reorder the terms:
9 + -6t + t2 = 1.2 + 9

Combine like terms: 1.2 + 9 = 10.2
9 + -6t + t2 = 10.2

Factor a perfect square on the left side:
(t + -3)(t + -3) = 10.2

Calculate the square root of the right side: 3.193743885

Break this problem into two subproblems by setting 
(t + -3) equal to 3.193743885 and -3.193743885.

Subproblem 1

t + -3 = 3.193743885 Simplifying t + -3 = 3.193743885 Reorder the terms: -3 + t = 3.193743885 Solving -3 + t = 3.193743885 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + t = 3.193743885 + 3 Combine like terms: -3 + 3 = 0 0 + t = 3.193743885 + 3 t = 3.193743885 + 3 Combine like terms: 3.193743885 + 3 = 6.193743885 t = 6.193743885 Simplifying t = 6.193743885

Subproblem 2

t + -3 = -3.193743885 Simplifying t + -3 = -3.193743885 Reorder the terms: -3 + t = -3.193743885 Solving -3 + t = -3.193743885 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + t = -3.193743885 + 3 Combine like terms: -3 + 3 = 0 0 + t = -3.193743885 + 3 t = -3.193743885 + 3 Combine like terms: -3.193743885 + 3 = -0.193743885 t = -0.193743885 Simplifying t = -0.193743885

Solution

The solution to the problem is based on the solutions from the subproblems. t = {6.193743885, -0.193743885}

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