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# Algebra: Expand and Simplify watch

1. I understand up to 6y2 + 3y - 4y - 3y2 - 3y2 + 12y but it is the ordering in the third line that troubles me.

Why hasn't + 12y taken priority over + 3y and - 4y? To me it makes sense for it to be 6y2 - 3y2 - 3y2 + 12y - 4y + 3y as this would reach 11y as well so I am confused.
2. I'm not exactly sure what you mean. If you mean the order that each of the terms are in then the order doesn't matter and doesn't have an effect on the answer. They've written it in that's order because they've just done it in order of how things work outback on the first line. But you say you get 11y as the answer anyway, which it is so there's no problem in any case.
3. (Original post by anon6789)

I understand up to 6y2 + 3y - 4y - 3y2 - 3y2 + 12y but it is the ordering in the third line that troubles me.

Why hasn't + 12y taken priority over + 3y and - 4y? To me it makes sense for it to be 6y2 - 3y2 - 3y2 + 12y - 4y + 3y as this would reach 11y as well so I am confused.
The reason why he wrote the terms in that way is because he groups the terms from highest order starting from the left (Order means power). No matter how which way you write it, it will still give you the answer, just that he has decided to work his way from the left

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