Post by Admin on Sept 23, 2016 19:19:58 GMT
When expanding brackets that are cubed like:
(A + B)³
The answer will always be like this:
A³ + 3A²B + 3AB² + B³
Notice a pattern?
The first term within the bracket starts off cubed and minuses a power each time you add with it. The second term within the bracket is the opposite as it starts off with 0 and adds a power each time you add with it.
Also, when doing this kind of question, there will always be 4 terms in the expression and the Coefficients will ALWAYS be 1,3,3,1 - in that order!
(A + B)³
The answer will always be like this:
A³ + 3A²B + 3AB² + B³
Notice a pattern?
The first term within the bracket starts off cubed and minuses a power each time you add with it. The second term within the bracket is the opposite as it starts off with 0 and adds a power each time you add with it.
Also, when doing this kind of question, there will always be 4 terms in the expression and the Coefficients will ALWAYS be 1,3,3,1 - in that order!