Question

Please help PLEASE HELP :( I need help

Answer 1

`y^4-2` is not a difference of squares:
`y^4` is the square of
`y^2`, but 2 is not a perfect square

`25m^2n^4-1` is a difference of squares:
`25m^2n^4` is the square of
`5mn^2` and 1 is the square of 1.

`p^8-q^4` is a difference of squares:
`p^8` is the square of
`p^4` and
`q^4` is the square of
`q^2`

`16x^2-24` is not a difference of squares:
`16x^2` is the square of
`4x`, but 24 is not a perfect square.