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Basic Mathematics QUESTION #2887
Question 1
Simplify: $(x + 3)(x - 3)$
  • $x^2 + 9$
  • $x^2 - 9$✔️
  • $x^2 - 6x + 9$
  • $2x - 6$
Correct Answer Explanation
This follows the identity $(a+b)(a-b) = a^2 - b^2$. Thus, $x^2 - 3^2 = x^2 - 9$.