Answer:
256
Explanation:
1- Find the prime factorization of 128
128 = 2 × 2 × 2 × 2 × 2 × 2 × 2
2- Find the prime factorization of 256
256 = 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2
3- Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the LCM:
LCM = 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2
4- LCM = 256