0=(0.3t^2)-6t+30

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Solution for 0=(0.3t^2)-6t+30 equation:


Simplifying
0 = (0.3t2) + -6t + 30

Reorder the terms:
0 = 30 + -6t + (0.3t2)

Solving
0 = 30 + -6t + (0.3t2)

Solving for variable 't'.

Combine like terms: 0 + -30 = -30
-30 + 6t + (-0.3t2) = 30 + -6t + (0.3t2) + -30 + 6t + (-0.3t2)

Reorder the terms:
-30 + 6t + (-0.3t2) = 30 + -30 + -6t + 6t + (0.3t2) + (-0.3t2)

Combine like terms: 30 + -30 = 0
-30 + 6t + (-0.3t2) = 0 + -6t + 6t + (0.3t2) + (-0.3t2)
-30 + 6t + (-0.3t2) = -6t + 6t + (0.3t2) + (-0.3t2)

Combine like terms: -6t + 6t = 0
-30 + 6t + (-0.3t2) = 0 + (0.3t2) + (-0.3t2)
-30 + 6t + (-0.3t2) = (0.3t2) + (-0.3t2)

Combine like terms: (0.3t2) + (-0.3t2) = 0.0
-30 + 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'.
100 + -20t + t2 = 0

Move the constant term to the right:

Add '-100' to each side of the equation.
100 + -20t + -100 + t2 = 0 + -100

Reorder the terms:
100 + -100 + -20t + t2 = 0 + -100

Combine like terms: 100 + -100 = 0
0 + -20t + t2 = 0 + -100
-20t + t2 = 0 + -100

Combine like terms: 0 + -100 = -100
-20t + t2 = -100

The t term is -20t.  Take half its coefficient (-10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
-20t + 100 + t2 = -100 + 100

Reorder the terms:
100 + -20t + t2 = -100 + 100

Combine like terms: -100 + 100 = 0
100 + -20t + t2 = 0

Factor a perfect square on the left side:
((t) + -10)((t) + -10) = 0

Calculate the square root of the right side: 0

Break this problem into two subproblems by setting 
((t) + -10) equal to 0 and 0.

Subproblem 1

(t) + -10 = 0 Simplifying (t) + -10 = 0 t + -10 = 0 Reorder the terms: -10 + t = 0 Solving -10 + t = 0 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + t = 0 + 10 Combine like terms: -10 + 10 = 0 0 + t = 0 + 10 t = 0 + 10 Combine like terms: 0 + 10 = 10 t = 10 Simplifying t = 10

Subproblem 2

(t) + -10 = 0 Simplifying (t) + -10 = 0 t + -10 = 0 Reorder the terms: -10 + t = 0 Solving -10 + t = 0 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + t = 0 + 10 Combine like terms: -10 + 10 = 0 0 + t = 0 + 10 t = 0 + 10 Combine like terms: 0 + 10 = 10 t = 10 Simplifying t = 10

Solution

The solution to the problem is based on the solutions from the subproblems. t = {10, 10}

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