Question

(198)
Evaluate using identities​

Answer 1

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Evaluate (198) ²

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●Using 》 (a−b) ²= a² −2ab+b²

● Writing (198)² as (200−2) ²

=> (200-2)²

=> 200² - 2 × 200 × 2 + 2²

=> 40000 - 800 + 4

=> 39204

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