1
x²-49<0<br>(x-7)(x+7)<0<br>x=7 x=-7
+ _ +
----------------(-7)-------------(7)-----------------------
-73
x²-49>0
x<-7 U x>7
2
x²-7x<0<br>x(x-7)<0<br>x=0 x=7
+ _ +
----------------(0)-------------(7)-----------------------
04
x²-7x>0
x<0 U x>7
Ответ 2