(t)=100-2t^2

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Solution for (t)=100-2t^2 equation:


Simplifying
(t) = 100 + -2t2
t = 100 + -2t2

Solving
t = 100 + -2t2

Solving for variable 't'.

Reorder the terms:
-100 + t + 2t2 = 100 + -2t2 + -100 + 2t2

Reorder the terms:
-100 + t + 2t2 = 100 + -100 + -2t2 + 2t2

Combine like terms: 100 + -100 = 0
-100 + t + 2t2 = 0 + -2t2 + 2t2
-100 + t + 2t2 = -2t2 + 2t2

Combine like terms: -2t2 + 2t2 = 0
-100 + t + 2t2 = 0

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

Divide each side by '2'.
-50 + 0.5t + t2 = 0

Move the constant term to the right:

Add '50' to each side of the equation.
-50 + 0.5t + 50 + t2 = 0 + 50

Reorder the terms:
-50 + 50 + 0.5t + t2 = 0 + 50

Combine like terms: -50 + 50 = 0
0 + 0.5t + t2 = 0 + 50
0.5t + t2 = 0 + 50

Combine like terms: 0 + 50 = 50
0.5t + t2 = 50

The t term is t.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
0.5t + 0.25 + t2 = 50 + 0.25

Reorder the terms:
0.25 + 0.5t + t2 = 50 + 0.25

Combine like terms: 50 + 0.25 = 50.25
0.25 + 0.5t + t2 = 50.25

Factor a perfect square on the left side:
(t + 0.5)(t + 0.5) = 50.25

Calculate the square root of the right side: 7.088723439

Break this problem into two subproblems by setting 
(t + 0.5) equal to 7.088723439 and -7.088723439.

Subproblem 1

t + 0.5 = 7.088723439 Simplifying t + 0.5 = 7.088723439 Reorder the terms: 0.5 + t = 7.088723439 Solving 0.5 + t = 7.088723439 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + t = 7.088723439 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + t = 7.088723439 + -0.5 t = 7.088723439 + -0.5 Combine like terms: 7.088723439 + -0.5 = 6.588723439 t = 6.588723439 Simplifying t = 6.588723439

Subproblem 2

t + 0.5 = -7.088723439 Simplifying t + 0.5 = -7.088723439 Reorder the terms: 0.5 + t = -7.088723439 Solving 0.5 + t = -7.088723439 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + t = -7.088723439 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + t = -7.088723439 + -0.5 t = -7.088723439 + -0.5 Combine like terms: -7.088723439 + -0.5 = -7.588723439 t = -7.588723439 Simplifying t = -7.588723439

Solution

The solution to the problem is based on the solutions from the subproblems. t = {6.588723439, -7.588723439}

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