a) (36, 45) = 3² = 3 • 3 = 9
36 = 2² • 3²
45 = 3² • 5¹
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36 | 2
18 | 2
9 | 3
3 | 3
1 | ➯ 36 = 2² • 3²
45 | 3
15 | 3
5 | 5
1 | ➯ 45 = 3² • 5¹