If x3 + y3 = 1674
x + y = 18,
Find the value of xy.
Answer & explanation
Correct answer: option 1
x3 + y3 = 1674
x + y = 18
(x + y)3 = x3 + y3 + 3xy (x + y)
5832 = 1674 + 54xy
xy = \(\frac{4158}{54}\)
xy = 77
If x3 + y3 = 1674
x + y = 18,
Find the value of xy.
Correct answer: option 1
x3 + y3 = 1674
x + y = 18
(x + y)3 = x3 + y3 + 3xy (x + y)
5832 = 1674 + 54xy
xy = \(\frac{4158}{54}\)
xy = 77