The expression 25x2 - 81 can be rewritten as (5x - 9)(5x + 9). (5x - 9) is a ____ of 25x2 - 81. A) divisor B) factor C) multiple
D) zero
1 answer:
Ans: B
The method (a^2-b^2) is considered as one of the many ways of factorisation.
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