Question

If a and b are any two such real numbers that $ab=0$, then

• A. $a=0$, $b\ne 0$
• B. $b=0$, $a\ne 0$
• C. $a=0$ or $b=0$ or both
• D. $a=b$ and $b=0$

Answer 1

The correct option is C $a=0$ or $b=0$ or both

If a and b are any two such real numbers that $ab=0$, then $a=0$or $b=0$ or both
for example
let $a=2$ and $b=0$ then $2\times 0=0$
and $a=0$ and $b=2$ then $0\times 2=0$
or both $a=b=0$ then $0\times 0=0$