7
(x-3)²-√5(x-3)<0<br>(x-3)(x-3-√5)<0<br>x=3 x=3+√5
+ _ +
-------------------(3)-------------(3+√5)------------------
x∈(3;3+√5)
8
x=2 x=-3 x=-7 x=5
_ + _ _ +
---------------(-7)-----------(-3)----------(2)-----------(5)--------------
x∈(-7;-3) U (5;∞)