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Ajutati-ma va rog............

Ajutatima Va Rog class=

Răspuns :

x-4≠0;x≠4
-2x²+17x-30≥0



pt a doua expresie
x1,2= (-17+-√(289-240)/(-4)= (17+-7)/4; x1=10/4=5/2; x2=24/4=6
deci x∈[5/2;6]

cum x≠4 , inseamna ca x∈[5/2;6]\{4} sau echivalent x∈[5/2;4)∪(4;6]=DVA