270=36t-.6t^2

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Solution for 270=36t-.6t^2 equation:


Simplifying
270 = 36t + -0.6t2

Solving
270 = 36t + -0.6t2

Solving for variable 't'.

Reorder the terms:
270 + -36t + 0.6t2 = 36t + -36t + -0.6t2 + 0.6t2

Combine like terms: 36t + -36t = 0
270 + -36t + 0.6t2 = 0 + -0.6t2 + 0.6t2
270 + -36t + 0.6t2 = -0.6t2 + 0.6t2

Combine like terms: -0.6t2 + 0.6t2 = 0.0
270 + -36t + 0.6t2 = 0.0

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

Divide each side by '0.6'.
450 + -60t + t2 = 0

Move the constant term to the right:

Add '-450' to each side of the equation.
450 + -60t + -450 + t2 = 0 + -450

Reorder the terms:
450 + -450 + -60t + t2 = 0 + -450

Combine like terms: 450 + -450 = 0
0 + -60t + t2 = 0 + -450
-60t + t2 = 0 + -450

Combine like terms: 0 + -450 = -450
-60t + t2 = -450

The t term is -60t.  Take half its coefficient (-30).
Square it (900) and add it to both sides.

Add '900' to each side of the equation.
-60t + 900 + t2 = -450 + 900

Reorder the terms:
900 + -60t + t2 = -450 + 900

Combine like terms: -450 + 900 = 450
900 + -60t + t2 = 450

Factor a perfect square on the left side:
(t + -30)(t + -30) = 450

Calculate the square root of the right side: 21.213203436

Break this problem into two subproblems by setting 
(t + -30) equal to 21.213203436 and -21.213203436.

Subproblem 1

t + -30 = 21.213203436 Simplifying t + -30 = 21.213203436 Reorder the terms: -30 + t = 21.213203436 Solving -30 + t = 21.213203436 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '30' to each side of the equation. -30 + 30 + t = 21.213203436 + 30 Combine like terms: -30 + 30 = 0 0 + t = 21.213203436 + 30 t = 21.213203436 + 30 Combine like terms: 21.213203436 + 30 = 51.213203436 t = 51.213203436 Simplifying t = 51.213203436

Subproblem 2

t + -30 = -21.213203436 Simplifying t + -30 = -21.213203436 Reorder the terms: -30 + t = -21.213203436 Solving -30 + t = -21.213203436 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '30' to each side of the equation. -30 + 30 + t = -21.213203436 + 30 Combine like terms: -30 + 30 = 0 0 + t = -21.213203436 + 30 t = -21.213203436 + 30 Combine like terms: -21.213203436 + 30 = 8.786796564 t = 8.786796564 Simplifying t = 8.786796564

Solution

The solution to the problem is based on the solutions from the subproblems. t = {51.213203436, 8.786796564}

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