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Q: Write the number 21 as a product of primes using exponents?

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It is in exponents: 22*3*52*7 = 2100

2*32*5

To write a composite whole number as the product of its prime factors is to write its prime factorization.

It is 1*79 = 79.0 because 79 is a prime number

5*3

As a product of its prime factors in exponents: 22*3*52 = 300

5x5x3

22 = 2 x 11

It is called the prime factorisation (or prime decomposition) of the composite number.

29 is already prime. Prime numbers can't be products of primes.

2 * 33 * 72

answer the question

78 = 2 * 3 * 13

46 = 23 x 2.

2*2*2*5*!

3 x 29 = 87

22 x 7

33 ft.

It is: 7 times 13 = 91

14 = 2 x 7

20 as a product of primes = 2 * 2 * 5

I'm not sure what you mean. But the factorization of a composite number into prime factors is unique, up to the ordering of the primes.

72 = 2 x 2 x 2 x 3 x 3

1450 as a product of primes = 2 * 5 * 5 * 29

It is: 2*3*3*11 = 198