Evaluate 9.7² using suitable identities.
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➺Given:
- 9.7²
➺ We can write 9.7² as:
- ( 10 )² + ( 0.3 )² - 2 × 10 × 0.3
➺ Identity used:
- ( a - b )² = a² + b² - 2ab
➺ Simplification:
- 100 + 0.09 - 6
- 94.09
✯9.7² is 94.09✯
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⇒ Evaluate the following by using suitable identities 992²
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