PLZ HELP MEEEEE(factoring)

[Guest]

factor
1)16+25x^2

2)81w^4-16x^8


thanks

 

[Unco]

The first one probably has a minus sign missing (16+25x^2 can't be factorised). In which case, both are a disguised difference of two squares: \(\displaystyle \mbox{a^2 - b^2 = (a + b)(a - b)}\).

Give it a shot.

Don't forget to show your work if need be.