a)\(\displaystyle \sqrt {{{226} \over {256}}} = {{\sqrt {226} } \over {\sqrt {256} }} = {{15} \over {16}}\)
b) \(\displaystyle \sqrt {0,0196} = \sqrt {{{196} \over {10000}}} \)\(\displaystyle = {{\sqrt {196} } \over {\sqrt {10000} }} = {{14} \over {100}} = 0,14\)
