### If  -3X   =  X3  , then X is _____ a rational number.

not

Step by Step Explanation:
1. Rational numbers: A rational number is any number that can be expressed as the quotient or fraction
 p q
of two integers, p and q, with the denominator q not equal to zero. Since q may be equal to 1, every integer is a rational number.
For example: reciprocal of
 p q
is
 q p
.
2. If you look at the question carefully, you will notice that you have
 -3 X
=
 X 3
.
Now,
 -3 X
=
 X 3

⇒ -3 × 3 = X × X
⇒ -9 = X2
⇒ X = √-9
-9 is not a rational number.
3. Thus, X is not a rational number.