Question

Write the set A={3,-3} in set builder form

Answer 1

Answer:

A={x: x belongs to R and x= +- 3}.

Answer 2

Answer:

{$x$ : $x^{2}=9$, $x$ ∈ Z}

Step by Step Explanation:

WKT, if:

$x^{2} =9$

⇒$x=$ ±$\sqrt{9}$

⇒$x=$ ±$3$

Therefore, x = 3 or x = -3

Thus, the answer will be:

{$x$ : $x^{2}=9$, $x$ ∈ Z}