Evaluate using the identify (a – b)2 = a2 – 2ab + b2.(198)2

1.	Evaluate using the identify (a – b)2 = a2 – 2ab + b2.(198)2
Answer» (198)² = (200 – 2)² (a – b)² = a² – 2ab + b² Here a = 200, b = 2 (200 – 2)² = 200²– (2)(200)(2) + 2² = 40000 – 800 + 4 (198)²= 39204

Answer»

(198)² = (200 – 2)²

(a – b)² = a² – 2ab + b²

Here a = 200, b = 2

(200 – 2)² = 200²– (2)(200)(2) + 2²

= 40000 – 800 + 4

(198)²= 39204

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