turkey-yks 2021 Q3

turkey-yks · Other · yks-ayt Simultaneous equations
Let $x$ and $y$ be positive real numbers such that
$$\begin{aligned} & x ^ { 2 } + 3 y ^ { 2 } = 8 \\ & 2 x ^ { 2 } + y ^ { 2 } = 6 \end{aligned}$$
What is the product $x \cdot y$?
A) 2
B) 4
C) 6
D) 8
E) 10
Let $x$ and $y$ be positive real numbers such that

$$\begin{aligned}
& x ^ { 2 } + 3 y ^ { 2 } = 8 \\
& 2 x ^ { 2 } + y ^ { 2 } = 6
\end{aligned}$$

What is the product $x \cdot y$?\\
A) 2\\
B) 4\\
C) 6\\
D) 8\\
E) 10