Q. 1 B5.0( 2 Votes )

Using suitable identities find the products.

(x – 5) (x + 8)

Answer :

Using identity -

(x + a)(x + b) = x2 + (a + b)x + ab, we get -


(x + (– 5)) (x + 8) = x2 + (– 5 + 8)x + (– 5)× 8


= x2 + 3x – 40


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