Question

Write in Roaster form
{x:x, x^2=20, x E z}
​

Answer 1

Step-by-step explanation:

Roster form of {x:x, x×2=20, x E z} is

{10}.

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Answer 2

Answer:

{ } - it is a null set Or empty set x onlt satisfies values of √20 and -√20 they are irrational no. s