Вправи: 91

91. Виконайте дії:

1) x\34 + 2x\43 = 3x+8x12 = 11x12; 2) 5b\114 – b\27 = 5b-2b14 = 3b14;

3) m\38 – n\46 = 3m-4n24; 4) 4\yx –3\xy = 4y-3xxy;

5) m\34n + m\26n = 3m+2m12n = 5m12n; 6) c\3b – d\13b = 3c- d3b;

7) aab2b2 + 1\1ab4 = a2b2+1ab4; 8) 11\3b5a – 2c\115ab = 33b-2c15ab;

9) m\mabc + c\cabm = m2+c2abcm.