How would I expand: (x + 3)^6 and (4x – 3y)^4 and Identify the third term in the expansion of (7x – 2y)^3   ?????????????????????????????????????

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Well, for your first question, you will have to look at the 7th row, since your power there is 6 (you always go for the row that comes after the number of your exponent. Follow the same pattern he uses, then when you find your terms, make sure that your x starts off with the power of six, and it decreases as you go on. the opposite happens for x. you start of with x^0 so that the sum is 6. then in the end, because it increases as you go, you will get x^6. -The same applies to your second question. :)