Вправи для повторення розділу 1 » 28

28. Виконайте дію: 1) 2/3p – 4/9p = (6-4)/9p = 2/9p; 2) (7x^2)/12m + x^2/m = (7x^2+ 12x^2)/12m = (19x^2)/12m; 3) (3x-2y)/12 + (y+x)/6 = (3x-2y+2y+2x)/12 = 5x/12; 4) (3x+b)/6 – (4a-b)/8 = (4(3a+b)- 3(4a-b))/24 = 7b/24; 5) 1/p^2 – (p-2)/p^3 = (p-p+2)/p^3 = 2/p^3 ; 6) (4a+b)/2a – (6b-a)/3b = (3b(4a+b)- 2a(6b-a))/6ab = (12ab+3b^2- 12ab+2a^2)/6ab = (2a^2+ 3b^2)/6ab.