evaluate each of the following using appropriate identities (a2-b2)2
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David opened a Recurring Deposit Account in a bank and deposited ₹ 300 per month for two years. If he received ₹ 7725 at the time of maturity, find the rate of interest per annum
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(a²-b²)²
a⁴+b⁴-2a²b²
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