t^2-20t-19=0

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Solution for t^2-20t-19=0 equation:


Simplifying
t2 + -20t + -19 = 0

Reorder the terms:
-19 + -20t + t2 = 0

Solving
-19 + -20t + t2 = 0

Solving for variable 't'.

Begin completing the square.

Move the constant term to the right:

Add '19' to each side of the equation.
-19 + -20t + 19 + t2 = 0 + 19

Reorder the terms:
-19 + 19 + -20t + t2 = 0 + 19

Combine like terms: -19 + 19 = 0
0 + -20t + t2 = 0 + 19
-20t + t2 = 0 + 19

Combine like terms: 0 + 19 = 19
-20t + t2 = 19

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 = 19 + 100

Reorder the terms:
100 + -20t + t2 = 19 + 100

Combine like terms: 19 + 100 = 119
100 + -20t + t2 = 119

Factor a perfect square on the left side:
(t + -10)(t + -10) = 119

Calculate the square root of the right side: 10.908712115

Break this problem into two subproblems by setting 
(t + -10) equal to 10.908712115 and -10.908712115.

Subproblem 1

t + -10 = 10.908712115 Simplifying t + -10 = 10.908712115 Reorder the terms: -10 + t = 10.908712115 Solving -10 + t = 10.908712115 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 = 10.908712115 + 10 Combine like terms: -10 + 10 = 0 0 + t = 10.908712115 + 10 t = 10.908712115 + 10 Combine like terms: 10.908712115 + 10 = 20.908712115 t = 20.908712115 Simplifying t = 20.908712115

Subproblem 2

t + -10 = -10.908712115 Simplifying t + -10 = -10.908712115 Reorder the terms: -10 + t = -10.908712115 Solving -10 + t = -10.908712115 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 = -10.908712115 + 10 Combine like terms: -10 + 10 = 0 0 + t = -10.908712115 + 10 t = -10.908712115 + 10 Combine like terms: -10.908712115 + 10 = -0.908712115 t = -0.908712115 Simplifying t = -0.908712115

Solution

The solution to the problem is based on the solutions from the subproblems. t = {20.908712115, -0.908712115}

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