t^2-2t-100=0

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Solution for t^2-2t-100=0 equation:


Simplifying
t2 + -2t + -100 = 0

Reorder the terms:
-100 + -2t + t2 = 0

Solving
-100 + -2t + t2 = 0

Solving for variable 't'.

Begin completing the square.

Move the constant term to the right:

Add '100' to each side of the equation.
-100 + -2t + 100 + t2 = 0 + 100

Reorder the terms:
-100 + 100 + -2t + t2 = 0 + 100

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

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

The t term is -2t.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2t + 1 + t2 = 100 + 1

Reorder the terms:
1 + -2t + t2 = 100 + 1

Combine like terms: 100 + 1 = 101
1 + -2t + t2 = 101

Factor a perfect square on the left side:
(t + -1)(t + -1) = 101

Calculate the square root of the right side: 10.049875621

Break this problem into two subproblems by setting 
(t + -1) equal to 10.049875621 and -10.049875621.

Subproblem 1

t + -1 = 10.049875621 Simplifying t + -1 = 10.049875621 Reorder the terms: -1 + t = 10.049875621 Solving -1 + t = 10.049875621 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + t = 10.049875621 + 1 Combine like terms: -1 + 1 = 0 0 + t = 10.049875621 + 1 t = 10.049875621 + 1 Combine like terms: 10.049875621 + 1 = 11.049875621 t = 11.049875621 Simplifying t = 11.049875621

Subproblem 2

t + -1 = -10.049875621 Simplifying t + -1 = -10.049875621 Reorder the terms: -1 + t = -10.049875621 Solving -1 + t = -10.049875621 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + t = -10.049875621 + 1 Combine like terms: -1 + 1 = 0 0 + t = -10.049875621 + 1 t = -10.049875621 + 1 Combine like terms: -10.049875621 + 1 = -9.049875621 t = -9.049875621 Simplifying t = -9.049875621

Solution

The solution to the problem is based on the solutions from the subproblems. t = {11.049875621, -9.049875621}

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