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Using a2 - b2, the value of 51 squared minus 49 squared is:
A200
B100
C400
D300
Answer & Solution
Correct answer: A. 200
1. Write it as (51 + 49)(51 - 49).
2. That is 100 times 2.
3. So the value is 200.
4. The answer is 200.
_Source: NCERT Class 9 Mathematics, Ch 4 'Exploring Algebraic Identities'_
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