Question

Using identity x^2+(a+b)x+ab
(1) 203×204

Answer 1

Ans:- 203×204

= (200 + 3) × (200 + 4)

= (200)^2 + (3 + 4)200 + 3 ×4 (x + a)(x + b) = x^2+(a+b)x+ab

= 40000 + 1400 + 12

= 41412

here is your answer

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