Answer:
Answer would be 4x.
Explanation:
We have to find the GCF ( Greatest Common Factor ) of the terms of the polynomial

Now we will find factors of each term of the given polynomial.
factors of 24x
= 2 × 2 × 3 × 2 × (x) (x) (x) (x) (x)
factors of 32x³ = 2 × 2× 2 × 2 × 2 (x) (x) (x)
factors of 12x = 2 × 2 × 3 × (x)
So GCF of all the terms is 2 × 2 × x = 4x