The binomial expansion of (a +
b)n for a positive integer n
These are all examples of binomial
expansions:
Find the binomial expansion
for any integer n.
Summary
Note that the coefficients in the expansion are the numbers in the
rows of Pascal's Triangle. Make sure you fully understand how this formula
works: Algebraic errors are often made in
examinations due to incorrect use of this formula. Negative signs get lost and
expressions like (ax)² become ax². When working out the coefficients
of the terms, use the standard formula for this. Pascal's triangle is not
recommended.
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