a: \(\sqrt{25^2}=\left|25\right|=25\)
b: \(\sqrt{\left(-0,16\right)^2}=\left|-0,16\right|=0,16\)
c: \(\sqrt{\left(\sqrt{7}-3\right)^2}=\left|\sqrt{7}-3\right|=3-\sqrt{7}\)
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