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Compute 98² using an identity:

A9604
B9504
C9404
D9904
Answer & Solution
Correct answer: A. 9604
We have 98² = (100 − 2)². That is 98² = 100² − 2·100·2 + 2². That is 98² = 10000 − 400 + 4. So 98² = 9604.
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