Вправи: 118

118. Зведіть дріб:

1) 1\2ab = 22ab; 1\aab = aa2b;

1\bab = bab2; 1\3a2ab = 3a23a3b;

1-2abab = -2ab-2a2b2; 1\3cab = 3c3abc

2) x-y\22xy = 2x-2y4xy; x-y\4x2xy = 4x2- 4xy8x2y;

x-y\3y2xy = 3xy-3y26xy2; x-y\-6x2y2xy = -6x3y+ 6x2y2-12x3y2;

x-y\4a2xy = 4ax-4ay8axy.

3) 2m-n\nm2n = 2mn-n2m2n2; 2m-n\2mm2n = 4m2- 2mn2m3n

2m-n\9mnm2n = 18m2n- 9mn29m3n2;

2m-n\-7m3n2m2n = -14m4n2+ 7m3n3-7m5n3.