13=55t-5t^2

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Solution for 13=55t-5t^2 equation:


Simplifying
13 = 55t + -5t2

Solving
13 = 55t + -5t2

Solving for variable 't'.

Reorder the terms:
13 + -55t + 5t2 = 55t + -55t + -5t2 + 5t2

Combine like terms: 55t + -55t = 0
13 + -55t + 5t2 = 0 + -5t2 + 5t2
13 + -55t + 5t2 = -5t2 + 5t2

Combine like terms: -5t2 + 5t2 = 0
13 + -55t + 5t2 = 0

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

Divide each side by '5'.
2.6 + -11t + t2 = 0

Move the constant term to the right:

Add '-2.6' to each side of the equation.
2.6 + -11t + -2.6 + t2 = 0 + -2.6

Reorder the terms:
2.6 + -2.6 + -11t + t2 = 0 + -2.6

Combine like terms: 2.6 + -2.6 = 0.0
0.0 + -11t + t2 = 0 + -2.6
-11t + t2 = 0 + -2.6

Combine like terms: 0 + -2.6 = -2.6
-11t + t2 = -2.6

The t term is -11t.  Take half its coefficient (-5.5).
Square it (30.25) and add it to both sides.

Add '30.25' to each side of the equation.
-11t + 30.25 + t2 = -2.6 + 30.25

Reorder the terms:
30.25 + -11t + t2 = -2.6 + 30.25

Combine like terms: -2.6 + 30.25 = 27.65
30.25 + -11t + t2 = 27.65

Factor a perfect square on the left side:
(t + -5.5)(t + -5.5) = 27.65

Calculate the square root of the right side: 5.25832673

Break this problem into two subproblems by setting 
(t + -5.5) equal to 5.25832673 and -5.25832673.

Subproblem 1

t + -5.5 = 5.25832673 Simplifying t + -5.5 = 5.25832673 Reorder the terms: -5.5 + t = 5.25832673 Solving -5.5 + t = 5.25832673 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + t = 5.25832673 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + t = 5.25832673 + 5.5 t = 5.25832673 + 5.5 Combine like terms: 5.25832673 + 5.5 = 10.75832673 t = 10.75832673 Simplifying t = 10.75832673

Subproblem 2

t + -5.5 = -5.25832673 Simplifying t + -5.5 = -5.25832673 Reorder the terms: -5.5 + t = -5.25832673 Solving -5.5 + t = -5.25832673 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + t = -5.25832673 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + t = -5.25832673 + 5.5 t = -5.25832673 + 5.5 Combine like terms: -5.25832673 + 5.5 = 0.24167327 t = 0.24167327 Simplifying t = 0.24167327

Solution

The solution to the problem is based on the solutions from the subproblems. t = {10.75832673, 0.24167327}

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