X в квадрате -14x+49 меньше =0

x^2-14x+49<=0 x^2-14x+49=0 д=14^2-4*49=0 x=14/2=7 (x-7)(x-7)= (x-7)^2<=0  <--------------------------------------|                                                 ===============(черная  точка)===================                    +                           +7                       +