Question

determinati numerele a si b , astfel incat : (a+2)⋅(b-3)=28

Answer 1

Răspuns:

Explicație pas cu pas:

28 = 1 x 28; 2 x 14; 4 x 7; 7 x 4; 14 x 2; 28 x 1; -1 x -28; -2 x -14; -4 x -7; -7 x -4;

-14 x -2; -28 x -1

______________

a + 2 = 1 ; a = 1-2 = -1

b - 3 = 28; b = 28 + 3 = 31

__________

a + 2 = 2; a = 2 - 2 = 0

b - 3 = 14; b = 14 + 3 = 17

___________

a + 2 = 4; a = 4 - 2 = 2

b - 3 = 7; b = 7 + 3 = 10

_____________

a + 2 = 7; a = 7 - 2 = 5

b - 3 = 4; b = 3 + 4 = 7

______________

a + 2 = 14; a = 14 - 2 = 12

b - 3 = 2; b = 2 + 3 = 5

______________

a + 2 = 28; a = 28 - 2 = 26

b - 3 = 1; b = 1 + 3 = 4

_________________

a + 2 = -1; a = -1 - 2 = -3

b - 3 = -28; b = -28 + 3 = -25

__________________

a + 2 = -2; a = -2 - 2 = -4

b - 3 = -14; b = -14 + 3 = -11

_________________

Ti-am lasat si tie 4 cazuri de rezolvat. Succes!