k and m are different integers
Currently, k=m, because both k and m equal to 12
12√12=k√m
The variable m is the value under the square root symbol, rather than the value that results when m is placed under the square root symbol.
So if k and m are currently equal, but k must be different than m, how can we increase k or m ?? Factoring the square root
12×√12
12×√4×√3
12×±2×√3
24×√3 or −24×√3
Now k=24 or k=−24 and m=3. Find k+m: 24+3=27 or −24+3=−21
B and E are the answers
Guys, above is the official explanation. In my opinion, it is clearly bogus because the
√4 cannot be
±2 . For the GRE it is only +2 the positive root accepted.
Waiting for GreenLightTestPrep for insights