Question

Evaluate the following using suitable identities (99)^2​

Answer 1

99² = (100 - 1)² = 100² + 1 - 2(100) = 10000 + 1 - 200 = 9801

Identity used: (a - b)² = a² + b² - 2ab

Answer 2

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Answer:

9801‬

Explanation:

Use - (a - b)² = a² + b² - 2ab

Where a=100,b=1

Step-by-step explanation:

Use - (a - b)² = a² + b² - 2ab

Where a=100,b=1

→ 100² + 1² - 2 × 100 × 1

→ 10000+1−200

→ 9801