If x3 + y3 = 126
x + y = 6
Find the value of xy.
Answer & explanation
Correct answer: option 2
x3 + y3 = 126
x + y = 6
(x + y)3 = x3 + y3 + 3xy (x + y)
216 = 126 + 18xy
xy = \(\frac{90}{18}\)
xy = 5
If x3 + y3 = 126
x + y = 6
Find the value of xy.
Correct answer: option 2
x3 + y3 = 126
x + y = 6
(x + y)3 = x3 + y3 + 3xy (x + y)
216 = 126 + 18xy
xy = \(\frac{90}{18}\)
xy = 5