102,103,104,105,120,130,140,150,123,132,124,142,125,152,134,143,135,153,145,154
201,203,204,205,210,230,240,250,213,231,214,241,215,251,234,243,235,253,245.254
301,302,304,305,310,320,340,350,321,312,314,341,351,315,324,342,325,352,345,354
401,402,403,405,410,420,430,450,412,421,413,431,415,451,423,432,425,452,435,453
501,502,503,504,510,520,530,540,512,521,513,531,514,541,523,532,524,542,534,543
2ab-b^2+a^2b-6b в виде суммы <span> двух двучленов.
</span><span>2ab-b^2+a^2b-6b=(2аb-b²)+(a²b-6b)
или
</span><span>2ab-b^2+a^2b-6b=2ab+a²b+(-b²-6b)
</span>2ab-b^2+a^2b-6b в виде разности двух двучленов.
2ab-b^2+a^2b-6b=<span><span>(2ab+a²b)-(b²+6b)</span></span>