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Using Brahmagupta's rules, the value of (-3) × (-4) is:
A-12, because product of two negatives stays negative
B+12, because removing a debt makes you richer
C-7, by adding the magnitudes algebraically
D0, since debts cancel each other out
Answer & Solution
Correct answer: B. +12, because removing a debt makes you richer
Product of a debt and a debt equals a fortune. Removing a debt of ₹3 four times makes you ₹12 richer, so (-3) × (-4) = +12.
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