Algebrahard · Past Paper
Factorize a^2/b^2 - 2 + b^2/a^2.
A(a/b - b/a)^2
B(a/b + b/a)^2
C(a^2-b^2)^2/(ab)^2
D(a-b)^2/(ab)
✓ Correct Answer: A — (a/b - b/a)^2
Perfect square: (a/b)^2 - 2(a/b)(b/a) + (b/a)^2.
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