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(x + 3)(x + 7) ≡ x2 + ax + 21

(x + 3)(x + 7) ≡ x2 + ax + 21
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(x + 3)(x + 7) ≡ x2 + ax + 21

User Saryta
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4 votes
The answer is c. Hope this helps
User Ryantm
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