Question

Номер 5. Сроооочно. Дам 95 балов

Answer 1

$\sqrt{a^{2}-2a+8-\sqrt{16a^{2}-8a+1}}=\sqrt{a^{2}-2a+8-\sqrt{(4a-1)^{2}}}=\sqrt{a^{2}-2a+8-|4a-1| }=\sqrt{a^{2}-2a+8-(4a-1)} =\sqrt{a^{2}-2a+8-4a+1 }=\sqrt{a^{2}-6a+9 }=\sqrt{(a-3)^{2}}=|a-3|$