
Lets get started :)
Referring to the picture I have uploaded might help you
We have the same base, which in this case is x.
When multiplication occurs in the same base, we add the powers

↓ (I am going to perform the problem separately and then give the final answer as the power to x)

=

↓
x²

The power of a power should be performed by multiplying the powers together.
2 x

=


Your final answer will be the second option
(12,1):12³+1³=1728+1=1729
(10,9): 10³+9³=1000+729=1729
☺☺☺☺

Length of the room is 5 m and width is 5 + 2 = 7 m.
Hope this helps.
r3t40
There are equal so neither