The factors of x2 – 4 are
(a) (x – 2), (x – 2)
(b) (x + 2), (x – 2)
(c) (x + 2), (x + 2)
(d) (x – 4), (x – 4)
The factors of x2 – 4 are,
X2 – 4 = x2 – 22
= (x + 2) (x – 2)
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