Решите срочно пожалуйста с решением огромное спасибо пойму любой подчерк

[latex]a)[/latex] [latex] \left \{ {{|x-2| \leq 5} \atop { \frac{x-7}{x+5} \geq 0 }} \right. [/latex] [latex] \left \{ {{-5 \leq x-2 \leq 5} \atop { \frac{x-7}{x+5} \geq 0 }} \right. [/latex] [latex] \left \{ {{-3 \leq x \leq 7} \atop { \frac{x-7}{x+5} \geq 0 }} \right. [/latex] ------------[-3]----------[7]------------                  //////////////    +               -                  + -----(-5)----------------[7]------------- ////////                       //////////////// Ответ:  {[latex]7[/latex]} [latex]b)[/latex] [latex] \left \{ {{ \frac{x+1}{x-4} \geq 0 } \atop {2(x-2)\ \textgreater \ 3(x-3)}} \right. [/latex] [latex] \left \{ {{ \frac{x+1}{x-4} \geq 0 } \atop {2x-4\ \textgreater \ 3x-9}} \right. [/latex] [latex] \left \{ {{ \frac{x+1}{x-4} \geq 0 } \atop {2x-3x\ \textgreater \ -9+4}} \right. [/latex] [latex] \left \{ {{ \frac{x+1}{x-4} \geq 0 } \atop {-x\ \textgreater \ -5}} \right. [/latex] [latex] \left \{ {{ \frac{x+1}{x-4} \geq 0 } \atop {x\ \textless \ 5}} \right.[/latex]       +               -                + ----------[-1]----------(4)------------ ////////////               /////////////// -------------------------------(5)------- ///////////////////////////////// Ответ: [latex](-[/latex] ∞ [latex];-1][/latex] ∪ [latex](4;5)[/latex] [latex]c)[/latex] [latex] \left \{ {{ \frac{x+5}{x-3} \geq 0 } \atop {12 \leq x^{2} +x}} \right. [/latex] [latex] \left \{ {{ \frac{x+5}{x-3} \geq 0 } \atop {12 - x^{2} -x \leq 0}} \right. [/latex] [latex] \left \{ {{ \frac{x+5}{x-3} \geq 0 } \atop {x^{2} +x -12 \geq 0}} \right. [/latex] [latex] \left \{ {{ \frac{x+5}{x-3} \geq 0 } \atop {(x-3)(x+4) \geq 0}} \right. [/latex] [latex] x^{2} +x-12=0[/latex] [latex]D=1+48=49[/latex] [latex]x_1= \frac{-1+7}{2}=3 [/latex] [latex]x_2= \frac{-1-7}{2}=-4 [/latex] [latex] x^{2} +x-12=(x-3)(x+4)[/latex]     +                 -                    + ---------[-5]-------------(3)------------ ////////////                 //////////////        +                   -           + ---------------[-4]-------[3]----------- /////////////////           //////////////   Ответ:  [latex](-[/latex] ∞ [latex];-5][/latex] ∪ [latex](3;+[/latex] ∞ [latex])[/latex]