输入1:a=1,b=-3,c=-15,d=-9;输出结果1: x1=5.8350214288,x2=-0.7341909961,x3=-2.1008304327 m=2808 n=1480.8213936866i
输入2:a=1,b=-3,c=-21,d=-9;输出结果2: x1=6.4641016151,x2=-0.4641016152,x3=-3 m=3456 n=3456i
输入1:a=1,b=5,c=-55,d=25;输出结果1: x1=-10.4772255751,x2=0.4772255751,x3=5 m=-13600 n=15937.8794072486i
输入2:a=1,b=5,c=-55,d=-25;输出结果2: x1=-10.1675416677,x2=-0.4385919003,x3=5.6061335679 m=-8200 n=19280.4564261327i
输入3:a=1,b=-5,c=-55,d=-25;输出结果3: x1=10.4772255751,x2=-0.4772255751,x3=-5 m=13600 n=15937.8794072486i
输入1:a=1,b=,c=-6,d=180;输出结果1: x1=-6,x2=3+4.5825756950i,x3=3-4.5825756950i m=-19440 n=19430.3976284584
输入2:a=1,b=,c=-6,d=-180;输出结果2: x1=6,x2=-3+4.5825756950i,x3=-3-4.5825756950i m=19440 n=19430.3976284584
输入1:a=1,b=5,c=-100,d=-500;输出结果1: x1=10,x2=-5,x3=-10 m=35000 n=31176.9145362398i
输入2:a=1,b=,c=-100,d=-50;输出结果2: x1=10.2412030021,x2=-0.5012594698,x3=-9.7399435323 m=5400 n=41216.9867894294i
输入1:a=1,b=5,c=-55,d=25;输出结果1: x1=-10.4772255751,x2=0.4772255751,x3=5 m=-13600 n=15937.8794072486i
输入2:a=1,b=5,c=-55,d=-25;输出结果2: x1=-10.1675416677,x2=-0.4385919003,x3=5.6061335679 m=-8200 n=19280.4564261327i
输入3:a=1,b=-5,c=-55,d=-25;输出结果3: x1=10.4772255751,x2=-0.4772255751,x3=-5 m=13600 n=15937.8794072486i
输入1:a=1,b=,c=-5,d=100;输出结果1: x1=-5,x2=2.5000000000+3.7080992435i,x3=2.5000000000-3.7080992435i m=-10800 n=10789.9953660787
输入2:a=1,b=,c=-5,d=-100;输出结果2: x1=5,x2=-2.5000000000+3.7080992435i,x3=-2.5000000000-3.7080992435i m=10800 n=10789.9953660787
输入1:a=1,b=-46,c=576,d=-26496;输出结果1: x1=46,x2=0+24i,x3=0-24i m=2686400 n=2685704.1258098406
输入1:a=1,b=46,c=-3568.6171,d=1656;输出结果1: x1=-87.1608638718,x2=0.4668836191,x3=40.6939802527 m=-6867165.9176000000 n=9367407.1569202198i输入2:a=1,b=-46,c=3568.6171,d=-1656;输出结果2: x1=0.4668258978,x2=22.7665870511+55.0367472618i,x3=22.7665870511-55.0367472618i m=-4952093.9176000000 n=8067643.6077350884
输入1:a=-4,b=0,c=3,d=-1/2;输出结果1: x1=-0.9396926208,x2=0.1736481777,x3=0.7660444431 m=-13.5000000000 n=23.3826859022i
sin10度=0.17364817766693，此方程可以3等分30度角？
输入1:a=8,b=-11,c=,d=3;输出结果1: x1=-0.4529344229,x2=0.8279344229,x3=1 m=-19.7031250000 n=6.6555897560i
输入2:a=8,b=11,c=,d=3;输出结果2: x1=-1.5342984576,x2=0.0796492288+0.4879214877i,x3=0.0796492288-0.4879214877i m=-61.2968750000 n=57.6610516293
输入3:a=8,b=,c=-11,d=3;输出结果3: x1=-1.2905694150,x2=0.2905694150,x3=1 m=-40.5000000000 n=53.4029493568i
输入4:a=8,b=,c=11,d=3;输出结果4: x1=-0.2599518305,x2=0.1299759153+1.1940189344i,x3=0.1299759153-1.1940189344i m=-40.5000000000 n=78.3094821845
输入1:a=-4,b=0,c=3,d=-1/2;输出结果1: x1=-0.9396926208,x2=0.1736481777,x3=0.7660444431 m=-13.5000000000 n=23.3826859022i
输入2:a=4,b=0,c=-3,d=-1/2;输出结果2: x1=0.9396926208,x2=-0.1736481777,x3=-0.7660444431 m=13.5000000000 n=23.3826859022i
输入3:a=4,b=-3,c=,d=-1/2;输出结果3: x1=0.9032219662,x2=-0.0766109831+0.3640387381i,x3=-0.0766109831-0.3640387381i m=16.8750000000 n=16.5340557638
输入4:a=4,b=3,c=,d=-1/2;输出结果4: x1=0.3388253494,x2=-0.5444126747+0.2693259532i,x3=-0.5444126747-0.2693259532i m=10.1250000000 n=9.5459415460