The factors of a2 - 1 - 2x - x2 are ____________.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. (a + 1 + x) (a – 1 – x).
(a2 - b2) = (a + b)(a - b)
a2 - 1 - 2x - x2 = a2 - (1 + 2x + x2)
Using, (a2 - b2) = (a + b)(a - b)
a2 - (1 + 2x + x2) = (a + 1 + x)(a - 1 - x)