Q. 1 C4.3( 14 Votes )

Use suitable identities to find the following products

(3x + 2)(3x - 2)

Answer :

using the identity (a + b) × (a – b) = a2 – b2


here a = 3x and b = 2


(3x + 2)(3x - 2) = (3x)2 – 22


Therefore (3x + 2)(3x - 2) = 9x2 – 4


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