Question

Using identities, evaluate 197X203

Answer 1

Step-by-step explanation:

197=(200-3)

203=(200+3)

Multiplying both

(200-3) x (200+3)

200(200-3)+3(200-3)

40000-600+600-9

40000-9

39991.

Answer 2

Evaluate : 197 × 203

197 × 203

(200-3) × (200+3)

Identity to use : (a+b)(a-b) = a² - b²

(200)² - (3)²

40000 - 9

39991

Hope it helps!!

Have a great day!!

SOME MORE IDENTITIES:

(a+b)² = a² + 2ab + b²

(a-b)² = a² - 2ab + b²

(x+a)(x+b) = x² + x(a+b) + ab