Question

If a and b are two odd positive integers, by which of the following integers is (a 4 − b 4 ) always divisible?​

Answer 1

Answer:

Hence (a - b) (a + b) x (a2 + b2) = a4 - b4 is always divisible by 23 = 8.

Step-by-step explanation:

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Answer 2

$\pink{Hence} (a - b) (a + b) x (a2 + b2) = a4 - b4 \\  is \: always \: divisible \: by \:  23 = 8.$