§ Задание 325
\[\boxed{\text{4.\ 325}}\]
\[25 = 5 \cdot 5 = ( - 5) \cdot ( - 5)\]
\[36 = 6 \cdot 6 = ( - 6) \cdot ( - 6)\]
\[49 = 7 \cdot 7 = ( - 7) \cdot ( - 7)\]
\[\boxed{\text{4.\ 325}}\]
\[25 = 5 \cdot 5 = ( - 5) \cdot ( - 5)\]
\[36 = 6 \cdot 6 = ( - 6) \cdot ( - 6)\]
\[49 = 7 \cdot 7 = ( - 7) \cdot ( - 7)\]