Complete factorisation with special identities

Complete factorisation with special identities

Secondary 2
3 marks
TGM Original Questions

Factorise completely \(\left(\frac45x+\frac13y \right)^2-\left(\frac45x-\frac13y\right)^2\).[3]

Solution:

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Answer:\(\dfrac{16 x y}{15}\)

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