Question

Номер 5. Сроооочно. Дам 95 балов

Answer 1

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