Answer:
(a) |ab| if a<0 and b>0
since the modulus of a number no matter whether it is positive or negative gives the result as a positive number.
if a<0 and b>0 then ab<0
this implies ab is a negative number and modulus of negative number comes out to be positive term.
eg: if a= -2 and b=3
Then ab= -6
and |ab|=|-6|=6
(b) |ab| if a>0 and b>0.
since both a and b are positive numbers i.e. strictly greater than zero.
hence, ab>0
eg: if a=5 and b=2
then ab=10
and |ab|=|10|=10
