3 + корень кв. из x - 5 = x - 4
=7 x-5=x^2-14x+49" alt="\sqrt{x-5}=x-7 x>=7 x-5=x^2-14x+49" align="absmiddle" class="latex-formula">
x=9
x=6
x>=7=>x=9
=7 x-5=x^2-14x+49" alt="\sqrt{x-5}=x-7 x>=7 x-5=x^2-14x+49" align="absmiddle" class="latex-formula">