Same chapter2 marksDifficulty: Easy
Expand (3a − 5b)2.
Expansions
1 markDifficulty: Easy
The expansion of (a − b)2 is:
- aa2 − b2
- ba2 + 2ab + b2
- ca2 − 2ab + b2
- da2 + b2
Original Khojo Papers practice question — not from a past board paper.
Answer
a2 − 2ab + b2
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Option (a) is the factorisation of a difference of squares, which is a different identity.
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