Algebramedium · Past Paper
Factorize x^2 - y^2 - 4x + 4.
A(x-2-y)(x-2+y)
B(x-y-2)(x+y+2)
C(x+y-2)(x-y+2)
D(x-2+y)^2
✓ Correct Answer: A — (x-2-y)(x-2+y)
(x^2 - 4x + 4) - y^2 = (x-2)^2 - y^2 = (x-2-y)(x-2+y).
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