hello!
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Let's simplify this expression.
The first step is to use the distributive property, which states:-

Simplify:-


Add 6x:-

Combine Like Terms:-

Now, we should write our answer in factored form, so we factor 2 out:-

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note:-
Hope everything is clear; if you need any clarification/explanation, kindly let me know, and I'll comment and/or edit my answer :)