0 \\ \\ x<3 \\ x>12 " alt="(x-3)(x-7)<5(x-3) \\ x^{2} -10x+21<5x-15 \\ x^{2} -15x+36<0 \\ D=225-144 \\ D=81 \\ \sqrt{81} =9 \\ x1=(15-9)/2=3 \\ x2=(15+9)/2=12 \\ (x-3)(x-12)<0 \\ x-3<0 \\ x-12>0 \\ \\ x<3 \\ x>12 " align="absmiddle" class="latex-formula">
нет решений
0 \\ x-12<0 \\ \\ x>3 \\ x<12 \\ \\ 3<x<12" alt="x-3>0 \\ x-12<0 \\ \\ x>3 \\ x<12 \\ \\ 3<x<12" align="absmiddle" class="latex-formula">
нет решений
-1 \\ x>-1/3 \\ x<2 \\ \\ -1/3<x<2" alt="x-2<0 \\ x<2 -x+2<2x+3 \\ 3x>-1 \\ x>-1/3 \\ x<2 \\ \\ -1/3<x<2" align="absmiddle" class="latex-formula">