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a- a√3\2 =4 /*2
2a-a√3=8
a(2-√3)=8
a= 8\(2-√3) *(2+√3) \ (2+√3)= 16+8√3\4-3 =16+8√3
P=a²√3\4=
(16+8√3)² *√3 \4=
(256+2*16*8√3+(8√3)² )* √3 \4=
(256+256√3+192) * √3 \4=
(448+256√3) *√3 \4=
448√3 +768 \4= 112√3+192