1=15t-5t^2

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Solution for 1=15t-5t^2 equation:


Simplifying
1 = 15t + -5t2

Solving
1 = 15t + -5t2

Solving for variable 't'.

Reorder the terms:
1 + -15t + 5t2 = 15t + -15t + -5t2 + 5t2

Combine like terms: 15t + -15t = 0
1 + -15t + 5t2 = 0 + -5t2 + 5t2
1 + -15t + 5t2 = -5t2 + 5t2

Combine like terms: -5t2 + 5t2 = 0
1 + -15t + 5t2 = 0

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

Divide each side by '5'.
0.2 + -3t + t2 = 0

Move the constant term to the right:

Add '-0.2' to each side of the equation.
0.2 + -3t + -0.2 + t2 = 0 + -0.2

Reorder the terms:
0.2 + -0.2 + -3t + t2 = 0 + -0.2

Combine like terms: 0.2 + -0.2 = 0.0
0.0 + -3t + t2 = 0 + -0.2
-3t + t2 = 0 + -0.2

Combine like terms: 0 + -0.2 = -0.2
-3t + t2 = -0.2

The t term is -3t.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3t + 2.25 + t2 = -0.2 + 2.25

Reorder the terms:
2.25 + -3t + t2 = -0.2 + 2.25

Combine like terms: -0.2 + 2.25 = 2.05
2.25 + -3t + t2 = 2.05

Factor a perfect square on the left side:
(t + -1.5)(t + -1.5) = 2.05

Calculate the square root of the right side: 1.431782106

Break this problem into two subproblems by setting 
(t + -1.5) equal to 1.431782106 and -1.431782106.

Subproblem 1

t + -1.5 = 1.431782106 Simplifying t + -1.5 = 1.431782106 Reorder the terms: -1.5 + t = 1.431782106 Solving -1.5 + t = 1.431782106 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + t = 1.431782106 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + t = 1.431782106 + 1.5 t = 1.431782106 + 1.5 Combine like terms: 1.431782106 + 1.5 = 2.931782106 t = 2.931782106 Simplifying t = 2.931782106

Subproblem 2

t + -1.5 = -1.431782106 Simplifying t + -1.5 = -1.431782106 Reorder the terms: -1.5 + t = -1.431782106 Solving -1.5 + t = -1.431782106 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + t = -1.431782106 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + t = -1.431782106 + 1.5 t = -1.431782106 + 1.5 Combine like terms: -1.431782106 + 1.5 = 0.068217894 t = 0.068217894 Simplifying t = 0.068217894

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.931782106, 0.068217894}

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