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Mathematics for IGCSE & O level - Algebraic Manipulation (Section 5 - No. 46)

What is the expansion of (x+y)(x-y)?

x^2 + y^2

x^2 - y^2

x^2 + 2xy + y^2

x^2 - 2xy + y^2

Wyjaśnienie

This is a difference of squares

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