47=73t+5t^2

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Solution for 47=73t+5t^2 equation:


Simplifying
47 = 73t + 5t2

Solving
47 = 73t + 5t2

Solving for variable 't'.

Reorder the terms:
47 + -73t + -5t2 = 73t + -73t + 5t2 + -5t2

Combine like terms: 73t + -73t = 0
47 + -73t + -5t2 = 0 + 5t2 + -5t2
47 + -73t + -5t2 = 5t2 + -5t2

Combine like terms: 5t2 + -5t2 = 0
47 + -73t + -5t2 = 0

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

Divide each side by '-5'.
-9.4 + 14.6t + t2 = 0

Move the constant term to the right:

Add '9.4' to each side of the equation.
-9.4 + 14.6t + 9.4 + t2 = 0 + 9.4

Reorder the terms:
-9.4 + 9.4 + 14.6t + t2 = 0 + 9.4

Combine like terms: -9.4 + 9.4 = 0.0
0.0 + 14.6t + t2 = 0 + 9.4
14.6t + t2 = 0 + 9.4

Combine like terms: 0 + 9.4 = 9.4
14.6t + t2 = 9.4

The t term is 14.6t.  Take half its coefficient (7.3).
Square it (53.29) and add it to both sides.

Add '53.29' to each side of the equation.
14.6t + 53.29 + t2 = 9.4 + 53.29

Reorder the terms:
53.29 + 14.6t + t2 = 9.4 + 53.29

Combine like terms: 9.4 + 53.29 = 62.69
53.29 + 14.6t + t2 = 62.69

Factor a perfect square on the left side:
(t + 7.3)(t + 7.3) = 62.69

Calculate the square root of the right side: 7.917701687

Break this problem into two subproblems by setting 
(t + 7.3) equal to 7.917701687 and -7.917701687.

Subproblem 1

t + 7.3 = 7.917701687 Simplifying t + 7.3 = 7.917701687 Reorder the terms: 7.3 + t = 7.917701687 Solving 7.3 + t = 7.917701687 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-7.3' to each side of the equation. 7.3 + -7.3 + t = 7.917701687 + -7.3 Combine like terms: 7.3 + -7.3 = 0.0 0.0 + t = 7.917701687 + -7.3 t = 7.917701687 + -7.3 Combine like terms: 7.917701687 + -7.3 = 0.617701687 t = 0.617701687 Simplifying t = 0.617701687

Subproblem 2

t + 7.3 = -7.917701687 Simplifying t + 7.3 = -7.917701687 Reorder the terms: 7.3 + t = -7.917701687 Solving 7.3 + t = -7.917701687 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-7.3' to each side of the equation. 7.3 + -7.3 + t = -7.917701687 + -7.3 Combine like terms: 7.3 + -7.3 = 0.0 0.0 + t = -7.917701687 + -7.3 t = -7.917701687 + -7.3 Combine like terms: -7.917701687 + -7.3 = -15.217701687 t = -15.217701687 Simplifying t = -15.217701687

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.617701687, -15.217701687}

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