do the prime factorisation of 72 by division method
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Step-by-step explanation:
In this example:
72 is even so 2 is a factor;
72 ÷ 2 = 36 , 36 and 36÷2 = 18
are also even so we have two more 2's as prime factors.
18÷2= 9 = 3×3
Hence we have two 3's as prime factors.
Therefore the prime factors of 72 are
2×2×2×3×3 =(2) square ×(3) square
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