Algebraeasy · Past Paper
Factorize x^2 - 9.
A(x-3)(x-3)
B(x+3)(x-3)
C(x+9)(x-1)
Dx(x-9)
✓ Correct Answer: B — (x+3)(x-3)
Using the identity a^2 - b^2 = (a-b)(a+b), where a=x and b=3.
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