1.
3 x 4 = 12
3 + 4 = 12
The two integers a and b are : 3 and 4
2.
-4 x 1 = -4
-4 + 1 = -3
The two integers a and b are : -4 and 1
3.
-3 x -3 = 9
-3 + -3 = -6
The two integers a and b are : -3 and -3
There you go! I really hope this helped, if there's anything just let me know! :)
441 is odd, so we can't divide it by 2.
Since the sum of its digits is
, which is divisible by 3, we can divide 441 by 3, and we have

Which is still divisible by 3, because
. We have

49 is not divisible by 3 anymore, nor by 5 (it doesn't end with 0 or 5).
It is divisible by 7 though, we have

and finally,

So, the factorization of 441 is

Answer:
it would take 23 hours
Step-by-step explanation: