I don't get this question :( can some one show me how to do it
(i)
ad+ac+bd+bc
I'm really confused :/

JackW
You have to notice that ad+ac can be factorise a(c+d) and bd+bc can also be factorised b(c+d). If you notice that the expression inside he brackets is the same we can write this as (a+b)(c+d)

Me
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