8=0.3t^2+0.6t+0.5

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Solution for 8=0.3t^2+0.6t+0.5 equation:


Simplifying
8 = 0.3t2 + 0.6t + 0.5

Reorder the terms:
8 = 0.5 + 0.6t + 0.3t2

Solving
8 = 0.5 + 0.6t + 0.3t2

Solving for variable 't'.

Combine like terms: 8 + -0.5 = 7.5
7.5 + -0.6t + -0.3t2 = 0.5 + 0.6t + 0.3t2 + -0.5 + -0.6t + -0.3t2

Reorder the terms:
7.5 + -0.6t + -0.3t2 = 0.5 + -0.5 + 0.6t + -0.6t + 0.3t2 + -0.3t2

Combine like terms: 0.5 + -0.5 = 0.0
7.5 + -0.6t + -0.3t2 = 0.0 + 0.6t + -0.6t + 0.3t2 + -0.3t2
7.5 + -0.6t + -0.3t2 = 0.6t + -0.6t + 0.3t2 + -0.3t2

Combine like terms: 0.6t + -0.6t = 0.0
7.5 + -0.6t + -0.3t2 = 0.0 + 0.3t2 + -0.3t2
7.5 + -0.6t + -0.3t2 = 0.3t2 + -0.3t2

Combine like terms: 0.3t2 + -0.3t2 = 0.0
7.5 + -0.6t + -0.3t2 = 0.0

Begin completing the square.  Divide all terms by
-0.3 the coefficient of the squared term: 

Divide each side by '-0.3'.
-25 + 2t + t2 = 0

Move the constant term to the right:

Add '25' to each side of the equation.
-25 + 2t + 25 + t2 = 0 + 25

Reorder the terms:
-25 + 25 + 2t + t2 = 0 + 25

Combine like terms: -25 + 25 = 0
0 + 2t + t2 = 0 + 25
2t + t2 = 0 + 25

Combine like terms: 0 + 25 = 25
2t + t2 = 25

The t term is 2t.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2t + 1 + t2 = 25 + 1

Reorder the terms:
1 + 2t + t2 = 25 + 1

Combine like terms: 25 + 1 = 26
1 + 2t + t2 = 26

Factor a perfect square on the left side:
(t + 1)(t + 1) = 26

Calculate the square root of the right side: 5.099019514

Break this problem into two subproblems by setting 
(t + 1) equal to 5.099019514 and -5.099019514.

Subproblem 1

t + 1 = 5.099019514 Simplifying t + 1 = 5.099019514 Reorder the terms: 1 + t = 5.099019514 Solving 1 + t = 5.099019514 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + t = 5.099019514 + -1 Combine like terms: 1 + -1 = 0 0 + t = 5.099019514 + -1 t = 5.099019514 + -1 Combine like terms: 5.099019514 + -1 = 4.099019514 t = 4.099019514 Simplifying t = 4.099019514

Subproblem 2

t + 1 = -5.099019514 Simplifying t + 1 = -5.099019514 Reorder the terms: 1 + t = -5.099019514 Solving 1 + t = -5.099019514 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + t = -5.099019514 + -1 Combine like terms: 1 + -1 = 0 0 + t = -5.099019514 + -1 t = -5.099019514 + -1 Combine like terms: -5.099019514 + -1 = -6.099019514 t = -6.099019514 Simplifying t = -6.099019514

Solution

The solution to the problem is based on the solutions from the subproblems. t = {4.099019514, -6.099019514}

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