Вправи: 183

183. Виконайте множення:

1) x8 • a5 = x •a8 •5 = xa40;

2) 3y • 4c = 3 •4y •c = 12yc;

3) x2y • a2c = x •a2y •2c = xa4yc;

4) 5ab • 3xy = 5a •3xb •y = 15axby;

5) 3x7y • 2a5b = 3x •2a7y •5b = 6xa35yb;

6) 3x4y • b4c = 3x •b4y •4c = 3xb16yc;

7) 3x5y • 2a6c = 3x •2a5y •6c = 2xa10yc = xa5yc;

8) 15a16b • 4x5y = 15a •4x16b •5y = 3ax4by;

9) 2x3y • 4y25b = 2x • 4y23y •5b = 8xy15b;

10) 3x7y • 14a5x = 3x •14a7y •5x = 6a5y;

11) 3b5y • 10a9b = 3b •10a5y •9b = 2a3y;

12) 3x5a • 2a23b = 3x • 2a25a •3b = 2xa5b.