Answer: 1/3^4 or 1 over 3 fourths beacuse you need to just flip it to get the exponent to be positive. 3^-4 is basically 3^-4 over 1.
Step-by-step explanation:
Distribute them then divide
<u> 30a² </u> <u> 42a³ </u> <u> 54a³b </u>
2 · 3 · 5 ·× a · a<u /> 2 · 3 · 7 · a · a · a 2 · 3 · 3 · 3 · a · a · a · b
GCF = 2 · 3 · a · a
GCF = 6a² <u />
I attached a photo
Hope this helps ʕ•ᴥ•ʔ
Just zoom in, couldn’t attached 2 photos