How do you factor by grouping #3ax - 3bx - ay + by#?

1 Answer
Mar 27, 2018

Answer:

#(a-b)(3x-y)#

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)#