How do you factor by grouping #3ax - 3bx - ay + by#?
1 Answer
Mar 27, 2018
Explanation:
#"consider the expression as two groups"#
#[3ax-3bx]+[-ay+by]#
#"factorise each 'group'"#
#color(red)(3x)(a-b)color(red)(-y)(a-b)#
#"take out the common factor "(a-b)#
#(a-b)(color(red)(3x-y))#
#rArr3ax-3bx-ay+by=(a-b)(3x-y)#
