Question

use an expansion formula to find the values

à). (997)²​

Answer 1

Answer:

994009

Step-by-step explanation:

(997)² = (1000 – 3)²

Here, a = 1000 and b = 3,

(1000 – 3)² = (1000)² – 2 x 1000 x 3 + 3² …. [(a – b)² = a² – 2ab + b² ]

= 1000000 – 6000 + 9

= 994009

∴ (997)² = 994009