Решите неравенство x^2 -19x + 84 /2(x - 5) > 0
Х²-19х+84=0,х1+х2=19 и х1*х2=84⇒х1=12 и х2=7 (х-12)(х-7)/2(х-5)>0 _ + _ + ------------------------------------------------ 5 7 12 x∈(5;7)U(12;≈)