Solve Nonlinear Systems by Addition
- $$\begin{array} { l } 2 x ^ { 2 } + x y - y ^ { 2 } = 3 \\x ^ { 2 } + 2 x y + y ^ { 2 } = 3\end{array}$$

question 187

Multiple Choice

Solve Nonlinear Systems By Addition
- $$\begin{array} { l } 2 x ^ { 2 } + x y - y ^ { 2 } = 3 \\x ^ { 2 } + 2 x y + y ^ { 2 } = 3\end{array}$$

• A) \(\left\{ \left( \frac { 2 \sqrt { 3 } } { 3 } , \frac { \sqrt { 3 } } { 3 } \right) , \left( - \frac { 2 \sqrt { 3 } } { 3 } , - \frac { \sqrt { 3 } } { 3 } \right) \right\}\)
• B) \(\left\{ \left( \frac { 2 \sqrt { 3 } } { 3 } , - \frac { \sqrt { 3 } } { 3 } \right) , \left( - \frac { 2 \sqrt { 3 } } { 3 } , \frac { \sqrt { 3 } } { 3 } \right) \right\}\)
• C) \(\left\{ \left( \frac { - 2 } { 3 } , \frac { 1 } { 3 } \right) , \left( \frac { 2 \sqrt { 3 } } { 3 } , - \frac { 1 } { 3 } \right) \right\}\)
• D) \(\left\{ \left( \frac { - 2 } { 3 } , - \frac { 1 } { 3 } \right) , \left( \frac { 2 \sqrt { 3 } } { 3 } , \frac { 1 } { 3 } \right) \right\}\)

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Definitions:

School Performance

A measure of how well students achieve or perform academically in their educational setting.

Variable Ratio

A schedule of reinforcement where a response is rewarded after an unpredictable number of responses, enhancing motivation to respond.

Fixed Ratio

A schedule of reinforcement where a response is only rewarded after a specified number of responses. It is often used in behavioral psychology.

Variable Interval

A reinforcement schedule where rewards are given after unpredictable time intervals, leading to moderate but steady response rates.