Algebraeasy · Past Paper
Find the product of (x + 3) and (x - 3).
Ax^2 + 9
Bx^2 - 6x + 9
Cx^2 - 9
Dx^2 + 6x + 9
✓ Correct Answer: C — x^2 - 9
Using the identity (a+b)(a-b) = a^2 - b^2, we get x^2 - 3^2 = x^2 - 9.
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