Answer :

09pqr4sT

Answer:

[tex]7ab[/tex]

Hope it helped.

${teks-lihat-gambar} 09pqr4sT
devishri1977

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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