a)
17x+17y+25 = 17x+17y+17+8 = 17(x+y+1) + 8
[17(x+y+1)+8
]: 17 = x+y+1 si rest 8
b)
17x²+17y+59
=17x²+17y+34+25 =[17(x²+y+1)+25]
[17(x²+y+1)+25
]:34= 1/2(x²+y+1) si rest 25
c)
14x+26y+13
= 14x+14y+12y+12+1 = 14(x+y) +12(y+1)+1
[14(x+y)
+12(y+1)+1 ] :2 = 7(x²+y)+6(y-1) si rest 1
Sper ca te-am ajutat !!!