Odpowiedź :
Odpowiedź:
a)
2x -3y + 8 = 2 * 4 - 3 * 3 + 8 = 8 - 9 +8 = 7
b)
(x - y)/(x + y) = (1 - 1/2)/(1 + 1/2) = 1/2 : 1 1/2 = 1/2 : 3/2 = 1/2 * 2/3 = 1/3
Odpowiedź:
a)
2x -3y + 8 = 2 * 4 - 3 * 3 + 8 = 8 - 9 +8 = 7
b)
(x - y)/(x + y) = (1 - 1/2)/(1 + 1/2) = 1/2 : 1 1/2 = 1/2 : 3/2 = 1/2 * 2/3 = 1/3