Question

find the value of a²+ b²+ c²- ab- bc- ca if a =1 b= 2 and c =-1​

Answer 1

Answer:

a²+b²+c²-ab-bc-ca

=>a =1 b= 2 c =-1

=>3²+2²+1²-(3×2)-(2×1)-(1×3)

=>9+4+1-6-2-3

=>3

Step-by-step explanation:

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