Q. 1 E3.9( 7 Votes )

Use suitable identities to find the following products

(1 + x) (1 + x)

Answer :

(1 + x) (1 + x) = (1 + x)2


Using identity (a + b)2 = a2 + 2ab + b2


Here a = 1 and b = x


(1 + x) (1 + x) = 12 + 2(1)(x) + x2


Therefore (1 + x) (1 + x) = 1 + 2x + x2


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