Question

evaluate using suitable identity (999) ​

Answer 1

Solution :-

→ (1000 - 1)²

• Apply identity
• (a - b)² = a² - 2ab + b²

→ (1000)² - 2 × 1000 × 1 + (1)²

→ 1000000 - 2000 + 1

→ 998001