How to solve (198)square using identities – InterviewSolution

1.

How to solve (198)square using identities

Answer»

Step-by-step explanation:

USING (a−b)

2

= a

2

−2ab+b

2

to EVALUATE (198)

2

2

as (200−2)

2

⇒ (200−2)

2

= 200

2

−2×200×2+2

2

= 40000−800+4

Hence the answer is 39204

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