If x+y =3 and x=2y, what is the value of x3+y3?
- 18
- 19
- 27
- 9
Answer: 9
Explanation: x3+y3x3+y3 = (x+y)3-3xy(x+y)= 33-3.2y.y .3= 27-18= 9Answer: 9
If x+y =3 and x=2y, what is the value of x3+y3?
Answer: 9
Explanation: x3+y3x3+y3 = (x+y)3-3xy(x+y)= 33-3.2y.y .3= 27-18= 9Answer: 9
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