Question

Please help me with sat questions URGENT!!!

Answer 1

Answer: C

Step-by-step explanation:

Based off of the factoring rule in algebra

`a^(2)` - 2ab +
`b^(2)` =
`(a - b)^(2)`

So in this case
`((1)/(m))^(2) - 2((1)/(m) )((1)/(n) ) + ((1)/(n))^(2)` =
`((1)/(m) - (1)/(n))^(2)` or choice C