How do you factor # xy -x + 5y -5# by grouping?
1 Answer
Aug 16, 2016
Explanation:
Group the terms in 'pairs' as follows.
#[xy-x]+[5y-5]# now factorise each pair.
#color(red)(x)(y-1)+color(red)(5)(y-1)# take out the
#color(blue)"common factor"# (y -1)
#(y-1)(color(red)(x+5))=(y-1)(x+5)#
