Question

Select the correct answer. Which expression has a greatest common factor of 3h? A. 18h2 − 6h B. 3 − 9h C. 6h2 − 2h D. 12h + 21h2

Answer 1

`12h + 21h^2`

Explanation:

A.
`18h^2 - 6h`

Both 18 and 6 are divisible by 6. GCF of h^2 and h is h. So GCF is 6h

B.
`3 − 9h`

3 and 9 are divisible by 3. So GCF is 3

C.
`6h^2 − 2h`

6 and 2 are divisible by 2. GCF is not 3 here

D.
`12h + 21h^2`

Both 12 and 21 are divisible by 3. GCF of h^2 and h is h

So GCF is 3h

Answer 2

Answer: D. 12h + 21h2

Step-by-step explanation: The answer is D,

because when you devide 12h/3h = 4

and for the other value 21h2/3h=7h

4 + 7h

if you perform the same operation with the rest of answers you will get a minor values if you compare with this results, because of that the answer with the greatest common factor is D.