38=0.5t^2+8t

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Solution for 38=0.5t^2+8t equation:


Simplifying
38 = 0.5t2 + 8t

Reorder the terms:
38 = 8t + 0.5t2

Solving
38 = 8t + 0.5t2

Solving for variable 't'.

Reorder the terms:
38 + -8t + -0.5t2 = 8t + -8t + 0.5t2 + -0.5t2

Combine like terms: 8t + -8t = 0
38 + -8t + -0.5t2 = 0 + 0.5t2 + -0.5t2
38 + -8t + -0.5t2 = 0.5t2 + -0.5t2

Combine like terms: 0.5t2 + -0.5t2 = 0.0
38 + -8t + -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'.
-76 + 16t + t2 = 0

Move the constant term to the right:

Add '76' to each side of the equation.
-76 + 16t + 76 + t2 = 0 + 76

Reorder the terms:
-76 + 76 + 16t + t2 = 0 + 76

Combine like terms: -76 + 76 = 0
0 + 16t + t2 = 0 + 76
16t + t2 = 0 + 76

Combine like terms: 0 + 76 = 76
16t + t2 = 76

The t term is 16t.  Take half its coefficient (8).
Square it (64) and add it to both sides.

Add '64' to each side of the equation.
16t + 64 + t2 = 76 + 64

Reorder the terms:
64 + 16t + t2 = 76 + 64

Combine like terms: 76 + 64 = 140
64 + 16t + t2 = 140

Factor a perfect square on the left side:
(t + 8)(t + 8) = 140

Calculate the square root of the right side: 11.832159566

Break this problem into two subproblems by setting 
(t + 8) equal to 11.832159566 and -11.832159566.

Subproblem 1

t + 8 = 11.832159566 Simplifying t + 8 = 11.832159566 Reorder the terms: 8 + t = 11.832159566 Solving 8 + t = 11.832159566 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + t = 11.832159566 + -8 Combine like terms: 8 + -8 = 0 0 + t = 11.832159566 + -8 t = 11.832159566 + -8 Combine like terms: 11.832159566 + -8 = 3.832159566 t = 3.832159566 Simplifying t = 3.832159566

Subproblem 2

t + 8 = -11.832159566 Simplifying t + 8 = -11.832159566 Reorder the terms: 8 + t = -11.832159566 Solving 8 + t = -11.832159566 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + t = -11.832159566 + -8 Combine like terms: 8 + -8 = 0 0 + t = -11.832159566 + -8 t = -11.832159566 + -8 Combine like terms: -11.832159566 + -8 = -19.832159566 t = -19.832159566 Simplifying t = -19.832159566

Solution

The solution to the problem is based on the solutions from the subproblems. t = {3.832159566, -19.832159566}

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