Найдите все корни уравнений:
1) \(\displaystyle b^2= 6 ^2\)
\(\displaystyle b_1=\)[ ], \(\displaystyle b_2=\)[ ]
2) \(\displaystyle x^2=\left(\frac{3}{7}\right)^2\)
\(\displaystyle x_1=\)[ ], \(\displaystyle x_2=\)[ ]