Question

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15 m3 n2, 18 m2 n2 and 21m​

Answer 1

Step-by-step explanation:

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Answer 2

15m³n²,18m²n² and 21m

=>15m³n²=3×5×m×m×n×n

=>18m²n²=2×3×3×m×m×n×n

=>21=3×7×m

•°•

$hcf = 3m$

And

$lcm = 3 \times m \times 5 \times 3 \times 2 \times 7 \times m \times m \times n \times n \\ \\ = > 630n ^{3} n ^{2}$