Hello - I am puzzled as to why we focus on the divisibility of g by 4 in the second sentence of the explanation: "By the Factor Foundation Rule, g would need to be divisible by 4 " My question is why do we talk about the requirement that g would need to be divisible by 4 and why not instea...

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Hello Ben many thanks for this explanation - yes it now makes perfect sense.

Many thanks for your help.

Regards

Frank