Example 6 Factorise 49𝑝^2 – 36
49𝑝^2 – 36
= 〖(7𝑝)〗^2 −6^2
Using 𝑎^2−𝑏^2 = (𝑎+𝑏) (𝑎−𝑏)
Here 𝑎=7𝑝, 𝑏=6
= (𝟕𝒑+𝟔) (𝟕𝒑 −𝟔)
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