Scrieți ecuația de gradul II cu coeficienții:
a) a = 3; b=6; c= -2;
b) a = 2; b=-1; c= 5;
d) a= 2; b = 5; c=0;
e) a = -2; b=0; c= 2.
c) a = 1; b = 2; c=-3​

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