Question

a=1,b=-1, c=2 then the value of a​2+b​2+c​2-ab-bc-ca is

Answer 1

Answer:(1)^2+(-1)^2+(2)^2-(1)(-1)-(-1)(2)-(2)(1)=1+1+4+1-2+2=7

Step-by-step explanation:

Answer 2

Answer:

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