Question 243349
5xy+25x-2y-10
.
Grouping means to "collect" terms together so you can factor this smaller group.
.
(5xy+25x)-2y-10
= (5xy+25x)-(2y+10)
= 5x(y+5)- 2(y+5)
Next, factor out (y+5):
= (y+5)(5x- 2)