Question

each of
of the following using
Evalute
identities :-
991 x 982​

Answer 1

Answer:

973162

Step-by-step explanation:

991 × 982 = (1000-9)(1000-18)

Using the identity (x+a)(x+b) = x²+(a+b)x+ab

Here x=1000, a=(-9), b=(-18)

(1000-9)(1000-18)= (1000)²+[-9+(-18)]1000+[(-9)(-18)]

                            = 1000000+(-27)1000+162

                            = 1000000+(-27000)+162

                            = 1000000-27000+162

                            = 973000+162

                            = 973162

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