Question

mdc de (12,27) (9,72) (-15,25)(-12,-18)(77,105)(168,189)(-385,490)

Answer 1

12, 27 / 2
  6, 27 / 2
  3, 27 / 3
  1,   9 / 3
  1,   3 / 3
  1,   1 / =  2.2.3.3.3 = 108
 
9, 72 / 2
9, 36 / 2
9, 18 / 2
9,   9 / 3
3,   3 / 3
1,   1 / = 2.2.2.3.3 = 72


-15, 25 / 3
-  5. 25 / 5
 -1,    5 / 5
 -1.    1 / = 3.5.5 = 75


-12, -18 / 2
 - 6. -  9 / 2
 - 3, -  9 / 3
 - 1, -  3 / 3
 - 1, -  1 / == 2.2.3.3 = 36


77, 105 / 3
77,   35 / 5
77,     7 / 7
11,     1 / 11
  1.     1 / =  3.5.7.11 = 1155


168, 189 / 2
  84, 189 / 2
  21, 189 / 3
    7,   63 / 3
    7,   21 / 3
    7,     7 / 7
    1,     1 / ==  2.2.3.3.3.7 = 756


-385, 490 / 2
-385, 245 / 5
-  77,   49 / 7
-  11,     7 / 7
-  11,     1 / 11
-    1,     1 / == 2.5.7.7.11 = 5390

Answer 2

12 e 27 = 108

9 e 72 = 72

- 15 e 25 = 75

- 12 e -18 = 36

77 e 105 = 1155

168 e 189 = 756

- 385 e 490 = 5390