Stage: 5 Challenge Level: 
Try some examples of your own.
What do you notice about the squares?
If you think there is a pattern can you prove that it will always work out that way?
Formulae. Modulus arithmetic. Long problems. Index notation/Indices. Manipulating algebraic expressions/formulae. Generalising. Binomial Theorem. Mathematical reasoning & proof. Polynomials. Stage 5 - Reviewed 2012.
Published November 1997.
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