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solve(2*a^2-(sqrt(3)*a-b)^2=a^2-b^2,b)$
rhs(part(%,1))$
sqrt(a^2-%^2)$
ev(%,abs(a)=a)$
e1:c^2+d^2+(e-sqrt(3)*a)^2=2*a^2$
e2:c^2+d^2+e^2=a^2$
e3:c^2+(d+%o4)^2+(e-%o2)^2=2*a^2$
solve([e1,e2,e3],[c,d,e])$
0$ /* B's x */
-%o4$ /* B's y */
rhs(part(part(%o8,1),1))$ /* G's x */
rhs(part(part(%o8,1),2))$ /* G's y */
%o11$ /* C's x */
factor(-%o4+%o12)$ /* C's y */
-%o9$ /* H's x */
-%o10$ /* H's y */
-%o11$ /* A's x */
-%o12$ /* A's y */
-%o13$ /* E's x */
-%o14$ /* E's y */
factor((%o16-%o10+%o12-%o14)*%o11)$ /* (H's y-B's y+G's y-C's y)*C's x */
solve(%o4*%o11/2=6,a)$ /* PB*G's x/2=6 ¤ò¡¡solve */
ev(%th(2),a:rhs(part(%,2)));36¡¦¡¦¡¦¡¦¡¦¡¦(Åú¤¨)
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