Question

Express the algebraic expression of 99 square ​

Answer 1

Answer:

9801

Step-by-step explanation:

99 = (100 - 1)

∴ 99² = (100 - 1)²

Using (a -b)² = a² + b² -2ab

∴(100 - 1)² = 100² + 1² - 2(100)(1)

                = 10000 + 1 - 200

                = 9800 + 1

∴ 99² = 9801

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