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Ex 14.2, 4 (ii) - Factorise p^4 - 81 - Chapter 14 NCERT Solutions


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Ex 14.2, 4 Factorise. (ii) 𝑝^4 – 81 𝑝^4 – 81 = (𝑝^2 )^2 − (9)^2 Using 𝑎^2 − 𝑏^2 = (a + b) (a − b) Here 𝑎=𝑝^2 and b = 9 Using 𝑎^2 − 𝑏^2 = (a + b) (a − b) Here 𝑎=𝑝^2 and b = 9 Again Using 𝑎^2 − 𝑏^2 = (a + b) (a − b) Here 𝑎 = p and b = 3 = (𝑝^2+9) (𝑝+3) (𝑝−3) = (𝒑 − 𝟑) (𝒑+𝟑) (𝒑^𝟐+ 𝟗)

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