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Special products 1.

Square of sum and difference.
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Special products 1.
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Foundational topics:
Power of powers
Extend it to multi-step powers as well.
Multiplication of algebraic expressions with one term.
The square of the sum of two terms:
The square of the sum of two terms is the same as the sum of the square of the first term, the double product of the two terms and the square of the second term.
The square of the difference of two terms:
The square of the difference of two terms is the same as the square of the first term minus the double product of the two terms, plus the square of the second term.
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