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How many identities are used for factorising here?
AFour
BNine
CSeven
DTwelve
Answer & Solution
Correct answer: A. Four
1. They are numbered with Roman numerals.
2. They run from I to IV.
3. These expressions can be easily factorised using Identities I, II, III and IV.
4. So the answer is four.
_Source: NCERT Class 8 Mathematics, Ch 12 'Factorisation'_
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