Question

a,b,c are three distint reals the a²+b²+c²-ab-bc-ca is always
a)< 0
b)>0
c)≤0
d)≥0​

Answer 1

Answer:

a,b,c, are three distint reals a^2+b^2+c^2-ab-bc-ac.ans=d)_>0