guys can u help me with 6 and 23 and 24 plz i really need help

Guys Can U Help Me With 6 And 23 And 24 Plz I Really Need Help class=
Guys Can U Help Me With 6 And 23 And 24 Plz I Really Need Help class=

Answer :

Answer:

6. (1-7y)(1+7y)

23. 2(4s-3u)(4s+3u)

24. 5q(q-2)(3q+2)