3a²+49 b²+ c² - 14 √3 ab + 14 bc - 2√3 ac
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Step-by-step explanation:
3a²+49 b²+ c² - 14 √3 ab + 14 bc - 2√3 ac
=(√3a)²+(-7b)²+(-c)²+2×(-7)×√3×a×b+
2×(-7)×(-1)×b×c+2×(-1)×√3×a×c
a=√3a, b= -7b, c= -c
(√3a-7b-c)²
is your answer
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