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Question

Mark the correct alternative in each of the following:

The factors of a2 − 1 − 2x − x2 are

(a) (a − x + 1) (a − x − 1)

(b) (a + x − 1) (a − x + 1)

(c) (a + x +1) (a − x + 1)

(d) none of these

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Solution

The given expression to be factorized is

Take commonfrom the last three terms and then we have

So, the correct choice is (c).


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