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Determine Whether (1,−2)( 1 , - 2 ) Is a Solution of the System

Question 116

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Determine whether (1,−2)( 1 , - 2 ) is a solution of the system. {3x+y−1=0x2+y2=4\left\{ \begin{array} { l } 3 x + y - 1 = 0 \\x ^ { 2 } + y ^ { 2 } = 4\end{array} \right.

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