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Aaronbartell · Answer 1 · 2023-10-06T06:06:24+0000

Answer:

-1

Explanation:

We have 2 letters, x and y. what letter is in all of them? none of them. that means the HCF can't contain a letter. let's take away the letters, we have 12, -4, 15, -5. Since -5 is a prime number. the answer is -1

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