By pythagoras Theorem.
x² +12²=13²
=>x² +144 =169
=>x² =169-144=25
=>x=√25=5 unit.
Hence x=5 is your answer.
Hope it helps...
Regards,
Leukonov/Olegion.
(a) The product of
is calculated to be 
(b)The product of
is not equal to the product of 
<u>Step-by-step explanation:</u>
<u>(a)</u>

b)

The product of
is not equal to the product of 
Answer:
6
Step-by-step explanation:
I learned this last year