300 IB Maths Exploration ideas, video tutorials and Exploration Guides
Binomial expansion:
How to find a constant term in a binomial expansion:
Binomial expansion with 2 brackets:
Solving simultaneous equations when 1 non-linear term:
An introduction to permutations
Using the permutation formula when objects are repeated
An introduction to combinations:
Combinations when we have restrictions:
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IB Maths Resources from Intermathematics 
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