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navik [9.2K]
3 years ago
5

Pls help me pls pls pls help me. thanks. ​

Mathematics
2 answers:
Naddika [18.5K]3 years ago
3 0

Answer:

7ab

Hope it helped.

nikdorinn [45]3 years ago
3 0

Answer:

Step-by-step explanation:

21ab² = 3 * 7 * a * b²

28abc = 2 * 2 * 7 * a * b * c

42abc² = 2 * 3 * 7 * a * b * c

HCF = 7ab

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