Question

Evaluate a2 + b2 + C2 - 2ab - 2bc - 2ca for a=1, b=1/2 and c=1/4​

Answer 1

Answer: Easy bro, here see

(a2) + (b2) + (c2) - (2ab) - (2bc) - (2ca)

(1 * 2) + (0.5 * 2) + (0.25 * 2) - (2 * {1 + 0.5}) - (2 * {0.5 + 0.25}) - (2 * {0.25 +1})

(1 * 2) + (0.5 * 2) + (0.25 * 2) - (2 * 1.5) - (2 * 0.75) - (2 * 1.25)

2 + 1 + 0.5 + 3 + 1.25 + 2.5 = 10.25

Hope this helps :)

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