Question

97 x 102
Use the formulae
(X+a) ( x+b)= x square + (a+b)x +ab
Please tell me the right ans

Answer 1

Answer:

Here is your step wise answer :

(100+(-2))(100+2)

100^+((-2)+3)×100+3×(-2)

10000+1×100+(-6)

10000+100+(-6)

10100+(-6)

10094....

Ans: 10094.

Step-by-step explanation:

Hope it helps ......

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Answer 2

Answer:

9894=102×97

Step-by-step explanation

102=90+12

97=90+7

x=90

a=7

b=12

(90+7)(90+12)                             (x+a)(x+b)using formula

= 90²+(7+12)90+7×12                 x²+(a+b)x+ab

=8100+19×90+84

=8100+1710+84

=9810+84

=9894

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