Ex 12.2, 2 (vi) - Factorise 9x^2 y2 - 16 - Chapter 14 Class 8 - Ex 12.2

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Ex 12.2, 2 Factorise. (vi) 9𝑥^2 𝑦^2 – 169𝑥^2 𝑦^2 – 16 = 〖(3𝑥𝑦)〗^2 − (4)^2 Using 𝒂^𝟐− 𝒃^𝟐 = (a + b) (a − b) Here a = 3𝑥𝑦 and b = 4 = (𝟑𝒙𝒚+𝟒) (𝟑𝒙𝒚 − 𝟒)

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