Question 59
Given the system
$$\begin{cases}x+y+z=7\\x^2+y^2+z^2=27\\xyz=5\end{cases}$$
how many ordered triples of real numbers $(x,y,z)$ solve it?
(A) 6
(B) 3
(C) 2
(D) 0
(E) Infinitely many.
$$\begin{cases}x+y+z=7\\x^2+y^2+z^2=27\\xyz=5\end{cases}$$
how many ordered triples of real numbers $(x,y,z)$ solve it?
(A) 6
(B) 3
(C) 2
(D) 0
(E) Infinitely many.