if x-y=11 and xy=8 find x³-y³
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Answer:
x³-y³ = 1595
Step-by-step explanation:
Given that : x-y = 11 and xy = 8
As we know that : a³-b³ = (a-b)³+3ab(a-b)
=> x³-y³ = (x-y)³+3xy(x-y)
=> x³-y³ = (11)³+3×8×11
=> x³-y³ = 1331+264
=> x³-y³ = 1595
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