The factors of $a^2 - 1 - 2x - x^2 $ are ________.
Answer & explanation
Correct answer: option 2
(a2 - b2) = (a + b)(a - b)
a2 - 1 - 2x - x2
= a2 - (1 + 2x + x2)
= a2 - (1 + 2x + x2) = (a + 1 + x) (a - 1 - x)
The factors of $a^2 - 1 - 2x - x^2 $ are ________.
Correct answer: option 2
(a2 - b2) = (a + b)(a - b)
a2 - 1 - 2x - x2
= a2 - (1 + 2x + x2)
= a2 - (1 + 2x + x2) = (a + 1 + x) (a - 1 - x)