45.1=15t+.5t^2

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Solution for 45.1=15t+.5t^2 equation:


Simplifying
45.1 = 15t + 0.5t2

Solving
45.1 = 15t + 0.5t2

Solving for variable 't'.

Reorder the terms:
45.1 + -15t + -0.5t2 = 15t + -15t + 0.5t2 + -0.5t2

Combine like terms: 15t + -15t = 0
45.1 + -15t + -0.5t2 = 0 + 0.5t2 + -0.5t2
45.1 + -15t + -0.5t2 = 0.5t2 + -0.5t2

Combine like terms: 0.5t2 + -0.5t2 = 0.0
45.1 + -15t + -0.5t2 = 0.0

Begin completing the square.  Divide all terms by
-0.5 the coefficient of the squared term: 

Divide each side by '-0.5'.
-90.2 + 30t + t2 = 0

Move the constant term to the right:

Add '90.2' to each side of the equation.
-90.2 + 30t + 90.2 + t2 = 0 + 90.2

Reorder the terms:
-90.2 + 90.2 + 30t + t2 = 0 + 90.2

Combine like terms: -90.2 + 90.2 = 0.0
0.0 + 30t + t2 = 0 + 90.2
30t + t2 = 0 + 90.2

Combine like terms: 0 + 90.2 = 90.2
30t + t2 = 90.2

The t term is 30t.  Take half its coefficient (15).
Square it (225) and add it to both sides.

Add '225' to each side of the equation.
30t + 225 + t2 = 90.2 + 225

Reorder the terms:
225 + 30t + t2 = 90.2 + 225

Combine like terms: 90.2 + 225 = 315.2
225 + 30t + t2 = 315.2

Factor a perfect square on the left side:
(t + 15)(t + 15) = 315.2

Calculate the square root of the right side: 17.753872817

Break this problem into two subproblems by setting 
(t + 15) equal to 17.753872817 and -17.753872817.

Subproblem 1

t + 15 = 17.753872817 Simplifying t + 15 = 17.753872817 Reorder the terms: 15 + t = 17.753872817 Solving 15 + t = 17.753872817 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + t = 17.753872817 + -15 Combine like terms: 15 + -15 = 0 0 + t = 17.753872817 + -15 t = 17.753872817 + -15 Combine like terms: 17.753872817 + -15 = 2.753872817 t = 2.753872817 Simplifying t = 2.753872817

Subproblem 2

t + 15 = -17.753872817 Simplifying t + 15 = -17.753872817 Reorder the terms: 15 + t = -17.753872817 Solving 15 + t = -17.753872817 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + t = -17.753872817 + -15 Combine like terms: 15 + -15 = 0 0 + t = -17.753872817 + -15 t = -17.753872817 + -15 Combine like terms: -17.753872817 + -15 = -32.753872817 t = -32.753872817 Simplifying t = -32.753872817

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.753872817, -32.753872817}

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