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+ b*x*y + c*y^2 + d*x + e*y + f; " } {MPLTEXT 1 205 0 "" }}{PARA 202 "" 0 "" {TEXT 207 31 "set the paramete rs a,b,c,d,e,f " }}{PARA 202 "" 0 "" {TEXT 207 17 "C = [a b/2 d/2" }}{PARA 202 "" 0 "" {TEXT 207 19 " b/2 c e/2" }}{PARA 202 "" 0 "" {TEXT 207 19 " d/2 e/2 f]" }}{PARA 200 "> " 0 "" {MPLTEXT 1 205 60 "con := subs( \{a=1, b=1, c=1, d=0, e=-3, f=-1 \},co nic(x,y) );" }{MPLTEXT 1 205 0 "" }}{PARA 202 "" 0 "" {TEXT 207 51 "so lve the equation conic=0 for y in dependency of x" }{TEXT 207 0 "" }} {PARA 200 "> " 0 "" {MPLTEXT 1 205 28 "(sol1,sol2) := solve(con,y);" } {MPLTEXT 1 205 0 "" }}{PARA 202 "" 0 "" {TEXT 207 98 "plotting. since \+ we have two solutions we have to plot them both in order to visualize \+ the conic..." }{TEXT 207 0 "" }}{PARA 200 "> " 0 "" {MPLTEXT 1 205 7 " r := 5:" }{MPLTEXT 1 205 0 "" }}{PARA 200 "> " 0 "" {MPLTEXT 1 205 41 "plot( [ sol1, sol2 ], x=-r..r, y=-r..r );" }{MPLTEXT 1 205 0 "" }} {PARA 203 "" 0 "" {TEXT 208 0 "" }}{PARA 204 "" 1 "" {XPPMATH 20 "6#>I 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