If x^3 + y^3=54 and x+y= 6, what is value of xy?
Answers
Answered by
2
Answer:
(x+y)³ = x³ + y³ + 3xy(x+y)
(6)³ = 54 + 3xy(6)
216 -54 = 18xy
162/18 = xy
xy = 9
Answered by
0
Answer:
Step-by-step explanation:
(x+y)³ = x³ + y³ + 3xy(x+y)
(6)³ = 54 + 3xy(6)
216 -54 = 18xy
162/18 = xy
xy = 9
Similar questions