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# C4 Binomial expansions watch

1. I am not sure on how to simplify binomial expansions and I need help, an example is (2+6x)^-3 can somebody explain how to simplify it as I'm really confused, thanks
2. Factor out 2 to become 2^-3(1+3x)^-3

Can you carry on from there?
3. (Original post by metrize)
Factor out 2 to become 2^-3(1+3x)^-3

Can you carry on from there?
so is the final answer 1/8(1+3x)^-3?
4. (Original post by Jack_Miller)
so is the final answer 1/8(1+3x)^-3?
Yeah do the expansion for (1+3x)^-3 and then multiply term by term by 1/8

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