45+15t=1.5t^2

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Solution for 45+15t=1.5t^2 equation:


Simplifying
45 + 15t = 1.5t2

Solving
45 + 15t = 1.5t2

Solving for variable 't'.

Combine like terms: 1.5t2 + -1.5t2 = 0.0
45 + 15t + -1.5t2 = 0.0

Begin completing the square.  Divide all terms by
-1.5 the coefficient of the squared term: 

Divide each side by '-1.5'.
-30 + -10t + t2 = 0

Move the constant term to the right:

Add '30' to each side of the equation.
-30 + -10t + 30 + t2 = 0 + 30

Reorder the terms:
-30 + 30 + -10t + t2 = 0 + 30

Combine like terms: -30 + 30 = 0
0 + -10t + t2 = 0 + 30
-10t + t2 = 0 + 30

Combine like terms: 0 + 30 = 30
-10t + t2 = 30

The t term is -10t.  Take half its coefficient (-5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
-10t + 25 + t2 = 30 + 25

Reorder the terms:
25 + -10t + t2 = 30 + 25

Combine like terms: 30 + 25 = 55
25 + -10t + t2 = 55

Factor a perfect square on the left side:
(t + -5)(t + -5) = 55

Calculate the square root of the right side: 7.416198487

Break this problem into two subproblems by setting 
(t + -5) equal to 7.416198487 and -7.416198487.

Subproblem 1

t + -5 = 7.416198487 Simplifying t + -5 = 7.416198487 Reorder the terms: -5 + t = 7.416198487 Solving -5 + t = 7.416198487 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + t = 7.416198487 + 5 Combine like terms: -5 + 5 = 0 0 + t = 7.416198487 + 5 t = 7.416198487 + 5 Combine like terms: 7.416198487 + 5 = 12.416198487 t = 12.416198487 Simplifying t = 12.416198487

Subproblem 2

t + -5 = -7.416198487 Simplifying t + -5 = -7.416198487 Reorder the terms: -5 + t = -7.416198487 Solving -5 + t = -7.416198487 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + t = -7.416198487 + 5 Combine like terms: -5 + 5 = 0 0 + t = -7.416198487 + 5 t = -7.416198487 + 5 Combine like terms: -7.416198487 + 5 = -2.416198487 t = -2.416198487 Simplifying t = -2.416198487

Solution

The solution to the problem is based on the solutions from the subproblems. t = {12.416198487, -2.416198487}

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