Question

Write in roster form
A = {x:x^2 = 9 , x€Z}

Answer 1

Answer:

A = {-3,3}

.........

Answer 2

Step-by-step explanation:

HEYA DEAR :)

A = {X : X²=9 and X€Z}

A = {X : X²=9 and X€Z}if X²=9

$\huge \boxed{ = > x = plus \: minus \: 3}$

X=plus minus three

so in set builder form

A={-3,3}

MORE QUESTIONS REGARDING THE TOPIC:-

Q.WHAT IS SET?

=>set is a well-defined collection of objects

Q.WHAT IS SET BUILDER FORM?

=>In this form the elements of sets are not shown but their property is shown.in this form all the elements of a set posses a single property which is possessed by any element outside the set.

Q.WHAT IS ROASTER FORM?

=> In this form elements are mentioned

but not their property.

HOPE IT HELPS

^_^