The vlue of (2-a)³+(2-b)³+(2-c)³-3(2-a)(2-b)(2-c) when a+b+c=6 is​

Answers 1

2-a+2-b+2-c= 6-(a+b+c) = 6-6 =0

let 2-a = p

2-b = q

2-c = r

p+q+r=0

p³+q³+r³-3pqr = (p+q+r)(p²+q²+r²-pq-qr-rp) =0

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