Question

the answer choices are A. I and ii, I and iii, ii and iv, iii and iv

Answer 1

Answer:

The correct option is B

Only I and III are TRUE

Explanation:

I. is valid

$a^4-b^4=(a^2+b^2)(a+b)(a-b)$

II. is invalid

III. is valid

$a^6-1=(a^2-1)(a^4+a^2+1)$

IV. is invalid