РОЗДІЛ 2. Раціональні вирази - Вправи 50 - 200 » 183

183. Виконайте множення: 1) x/8 • a/5 = (x •a)/(8 •5) = xa/40; 2) 3/y • 4/c = (3 •4)/(y •c) = 12/yc; 3) x/2y • a/2c = (x •a)/(2y •2c) = xa/4yc; 4) 5a/b • 3x/y = (5a •3x)/(b •y) = 15ax/by; 5) 3x/7y • 2a/5b = (3x •2a)/(7y •5b) = 6xa/35yb; 6) 3x/4y • b/4c = (3x •b)/(4y •4c) = 3xb/16yc; 7) 3x/5y • 2a/6c = (3x •2a)/(5y •6c) = 2xa/10yc = xa/5yc; 8) 15a/16b • 4x/5y = (15a •4x)/(16b •5y) = 3ax/4by; 9) 2x/3y • 〖4y〗^2/5b = (2x • 〖4y〗^2)/(3y •5b) = 8xy/15b; 10) 3x/7y • 14a/5x = (3x •14a)/(7y •5x) = 6a/5y; 11) 3b/5y • 10a/9b = (3b •10a)/(5y •9b) = 2a/3y; 12) 3x/5a • 〖2a〗^2/3b = (3x • 〖2a〗^2)/(5a •3b) = 2xa/5b.