## Precalculus (6th Edition) Blitzer

The given system is: \begin{align} & {{x}^{2}}+{{y}^{2}}=4\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \left( \text{I} \right) \\ & {{x}^{2}}+{{y}^{2}}=25\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \left( \text{II} \right) \end{align} Equate both equation (I) and equation (II): $4=25$ This statement is not true. Hence, the statement makes sense.