Question

the product of a non-zero ratiobal number and an irrational number is
​

Answer 1

Indirect Proof (Proof by Contradiction):
(Assume the opposite of what you want to prove, and show it leads to a contradiction of a known fact.)

Answer 2

$<marquee><B><I>$
Thanks for asking question.
$</marquee><B><I>$
$<marquee><B><I>$
$\huge\ {\pink{Answer:}}$
$</marquee><B><I>$

The product of non zero rational number and an irrational number is irrational number.

$<marquee><B><I>$
Thanks for asking question.
$</marquee><B><I>$