SOLUTION: How do I expand (x+1)^3 I need to know the rule for expanding cubed brackets in general. Thanks so much!

Question 882636: How do I expand (x+1)^3
I need to know the rule for expanding cubed brackets in general.
Thanks so much!

Answer by josgarithmetic(39627) (Show Source): You can put this solution on YOUR website!
You could either look-up the rule or derive the rule yourself.
Start with , and fully multiply to get the resulting product sum of terms. Also, read about Pascal's Triangle.

The shortcut uses coefficients 1, 3, 3, 1;
The terms containing a start with , and each term increases by 1 in degree on b while decreases by 1 on the degree for a.

You should find ;
More simply
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