1=18t+5t^2

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Solution for 1=18t+5t^2 equation:


Simplifying
1 = 18t + 5t2

Solving
1 = 18t + 5t2

Solving for variable 't'.

Reorder the terms:
1 + -18t + -5t2 = 18t + -18t + 5t2 + -5t2

Combine like terms: 18t + -18t = 0
1 + -18t + -5t2 = 0 + 5t2 + -5t2
1 + -18t + -5t2 = 5t2 + -5t2

Combine like terms: 5t2 + -5t2 = 0
1 + -18t + -5t2 = 0

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

Divide each side by '-5'.
-0.2 + 3.6t + t2 = 0

Move the constant term to the right:

Add '0.2' to each side of the equation.
-0.2 + 3.6t + 0.2 + t2 = 0 + 0.2

Reorder the terms:
-0.2 + 0.2 + 3.6t + t2 = 0 + 0.2

Combine like terms: -0.2 + 0.2 = 0.0
0.0 + 3.6t + t2 = 0 + 0.2
3.6t + t2 = 0 + 0.2

Combine like terms: 0 + 0.2 = 0.2
3.6t + t2 = 0.2

The t term is 3.6t.  Take half its coefficient (1.8).
Square it (3.24) and add it to both sides.

Add '3.24' to each side of the equation.
3.6t + 3.24 + t2 = 0.2 + 3.24

Reorder the terms:
3.24 + 3.6t + t2 = 0.2 + 3.24

Combine like terms: 0.2 + 3.24 = 3.44
3.24 + 3.6t + t2 = 3.44

Factor a perfect square on the left side:
(t + 1.8)(t + 1.8) = 3.44

Calculate the square root of the right side: 1.854723699

Break this problem into two subproblems by setting 
(t + 1.8) equal to 1.854723699 and -1.854723699.

Subproblem 1

t + 1.8 = 1.854723699 Simplifying t + 1.8 = 1.854723699 Reorder the terms: 1.8 + t = 1.854723699 Solving 1.8 + t = 1.854723699 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1.8' to each side of the equation. 1.8 + -1.8 + t = 1.854723699 + -1.8 Combine like terms: 1.8 + -1.8 = 0.0 0.0 + t = 1.854723699 + -1.8 t = 1.854723699 + -1.8 Combine like terms: 1.854723699 + -1.8 = 0.054723699 t = 0.054723699 Simplifying t = 0.054723699

Subproblem 2

t + 1.8 = -1.854723699 Simplifying t + 1.8 = -1.854723699 Reorder the terms: 1.8 + t = -1.854723699 Solving 1.8 + t = -1.854723699 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1.8' to each side of the equation. 1.8 + -1.8 + t = -1.854723699 + -1.8 Combine like terms: 1.8 + -1.8 = 0.0 0.0 + t = -1.854723699 + -1.8 t = -1.854723699 + -1.8 Combine like terms: -1.854723699 + -1.8 = -3.654723699 t = -3.654723699 Simplifying t = -3.654723699

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.054723699, -3.654723699}

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