If x - y = 2 and xy = 80, what is the value of x3 - y3 ?
Solution
Correct Answer: Option B
Solution:
x3 - y3 = (x - y)3 + 3xy (x - y)
= 23 + 3 \( \times \) 80 \( \times \) 2
[x - y = 2 এবং xy = 80 বসিয়ে ]
= 8 + 480
= 488
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