Question

8. Find x3- y3, if x - y = 5 and xy = 14
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Answer 1

Answer:

we know that x3-y3=x3-y3-3xy(x-y)

now put the value to get the answer,

x3-y3-3(14)-(5)

x3-y3-42-5

x3-y3-47

therefore x3-y3=47