this post was submitted on 12 Dec 2023
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If there are rules about which dot comes first then you are not allowed to do this.
You aren't allowed to do this because division isn't transitive.
In fact you're not allowed to add the multiplication - it breaks up the factorised term, hence gives a different answer.
The rule is you're not allowed to add dots (multiplication) - broke up the factorised term, which is why a different answer.