1.

Let det A=|{:(l,m,n),(p,q,r),(1,1,1):}| and if (l-m)^2 + (p-q)^2 =9, (m-n)^2 + (q-r)^2=16, (n-l)^2 +(r-p)^2=25, then the value ("det." A)^2 equals :

Answer»

36
100
144
160

Answer :C


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