Algebraeasy · Past Paper
What are the factors of x^2 - 9?
A(x-3)(x-3)
B(x+3)(x-3)
C(x+9)(x-1)
D(x+3)(x+3)
✓ Correct Answer: B — (x+3)(x-3)
This is a difference of two squares: a^2 - b^2 = (a+b)(a-b). Here x^2 - 3^2 results in (x+3)(x-3).
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