t^2-20t-2=0

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Solution for t^2-20t-2=0 equation:


Simplifying
t2 + -20t + -2 = 0

Reorder the terms:
-2 + -20t + t2 = 0

Solving
-2 + -20t + t2 = 0

Solving for variable 't'.

Begin completing the square.

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + -20t + 2 + t2 = 0 + 2

Reorder the terms:
-2 + 2 + -20t + t2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -20t + t2 = 0 + 2
-20t + t2 = 0 + 2

Combine like terms: 0 + 2 = 2
-20t + t2 = 2

The t term is -20t.  Take half its coefficient (-10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
-20t + 100 + t2 = 2 + 100

Reorder the terms:
100 + -20t + t2 = 2 + 100

Combine like terms: 2 + 100 = 102
100 + -20t + t2 = 102

Factor a perfect square on the left side:
(t + -10)(t + -10) = 102

Calculate the square root of the right side: 10.099504938

Break this problem into two subproblems by setting 
(t + -10) equal to 10.099504938 and -10.099504938.

Subproblem 1

t + -10 = 10.099504938 Simplifying t + -10 = 10.099504938 Reorder the terms: -10 + t = 10.099504938 Solving -10 + t = 10.099504938 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + t = 10.099504938 + 10 Combine like terms: -10 + 10 = 0 0 + t = 10.099504938 + 10 t = 10.099504938 + 10 Combine like terms: 10.099504938 + 10 = 20.099504938 t = 20.099504938 Simplifying t = 20.099504938

Subproblem 2

t + -10 = -10.099504938 Simplifying t + -10 = -10.099504938 Reorder the terms: -10 + t = -10.099504938 Solving -10 + t = -10.099504938 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + t = -10.099504938 + 10 Combine like terms: -10 + 10 = 0 0 + t = -10.099504938 + 10 t = -10.099504938 + 10 Combine like terms: -10.099504938 + 10 = -0.099504938 t = -0.099504938 Simplifying t = -0.099504938

Solution

The solution to the problem is based on the solutions from the subproblems. t = {20.099504938, -0.099504938}

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