if x-y=5 and xy=84 find the value of x cube - y cube
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Answered by
2
Answer:
Answer is 1385.
Explanation step by step:
we know that,
(x-y)^3 = x^3 - y^3 - 3xy (x - y)
=> x^3 - y^3 = (x - y)^3 + 3xy (x - y)
=> x^3 - y^3 = (x - y)^3 + 3xy (x - y) => x^3 - y^3 = (5)^3 + 3 (84) (5)
=> x^3 - y^3 = (x - y)^3 + 3xy (x - y) => x^3 - y^3 = (5)^3 + 3 (84) (5) => x^3 - y^3 = 125 + 1260
=> x^3 - y^3 = (x - y)^3 + 3xy (x - y) => x^3 - y^3 = (5)^3 + 3 (84) (5) => x^3 - y^3 = 125 + 1260= 1385
Answered by
4
Answer:
Hey mate here is ur ans...
Step-by-step explanation:
Given,
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