tolongin kak udh mlm nih!! 1.p4+r2+3pq+3r2 2.2×+5y-×+17y 3.6y-y2+y+7y2

1] p^4 + r^2 + 3pq + 3r^2
= p^4 + r^2 + 3r^2 + 3pq
= p^4 + 4r^2 + 3pq

2] 2x + 5y - x + 17y
= 2x - x + 5y + 17y
= x + 22y

3] 6y - y^2 + y + 7y^2
= 6y + y - y^2 + 7y^2
= 7y + 6y^2