Question

find the product using the identity (x+a)(x+b)=x^2+x (a+b)+ab 198×209​

Answer 1

(200 - 2) (200 + 9)= (200)2 + 200(9-2) - (9)(-2)

=40,000 + 1400 + 18

=41,418

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Answer 2

Answer:

41382

Step-by-step explanation:

=198*209

=(200-2)(200+9)

=200^2 + 200(-2+9)+ -2*9

=40000 + 1400 - 18

=41382