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how can you call 4 & 9 co-prime when they are not prime numbers

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Humailbro2233idn

Answer:

4 and 9 are coprime (relatively, mutually prime) if they have no common prime factors, that is, if their greatest (highest) common factor (divisor), gcf, hcf, gcd, is 1.

Calculate the greatest (highest) common factor (divisor), gcf, hcf, gcd

Approach 1. Integer numbers prime factorization:

Prime Factorization of a number: finding the prime numbers that multiply together to make that number.

4 = 22;

4 is not a prime, is a composite number;

9 = 32;

9 is not a prime, is a composite number;

Positive integers that are only dividing by themselves and 1 are called prime numbers. A prime number has only two factors: 1 and itself.

A composite number is a positive integer that has at least one factor (divisor) other than 1 and itself.

>> Integer numbers prime factorization

Calculate greatest (highest) common factor (divisor):

Multiply all the common prime factors, by the lowest exponents (if any).

But the two numbers have no common prime factors.

gcf, hcf, gcd (4; 9) = 1;

coprime numbers (relatively prime)

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