Classify the following sets `{x: x^2-2=0,` x is rational}`

Classify the following sets A={x: x^2-9x+20=0 ,x is real} and B={4,5}.

Classify the following sets : Set of all concentric circles touching the x-axis at the origin.

Solve the following equations x^2-2x+3/2=0

Which of the following sets are empty sets? i) A={ x: x^2-3=0 . and x is rational } ii) B={x: x is an even prime number } iii) C={x: 4 lt x lt 5, x in N} iv) D={x: x^2=25 and 'x' is an odd integer.}

List all the element of the following sets: C = {x:x is an integer, x^2le4 }

Taking the set of natural number as the universal set, write down the complements of the following sets: {x:x is a perfect cube}

Taking the set of natural number as the universal set, write down the complements of the following sets: {x:x is an even natural number }

Taking the set of natural number as the universal set, write down the complements of the following sets:{x:x is an odd natural number}

Taking the set of natural number as the universal set, write down the complements of the following sets: {x:x is a prime number}