Answer this please.
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(a+b+c)2 =a2+b2 +c2 +2 (ab +bc + ca)
4×4 = 14 + 2 ( ab + bc +ca)
16 -14 = 2 (ab +bc +ca )
1 = ab + bc +ca
4×4 = 14 + 2 ( ab + bc +ca)
16 -14 = 2 (ab +bc +ca )
1 = ab + bc +ca
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