Răspuns :
Răspuns:
1. 1,7,13,19,25,29,35,39 (+6)
2. a. 2x×2x-7x-9=0/+9
2x×2x-7x=9
Răspuns:
1.a)24,27,33,39
b)4×20=80
2)22²-72-9=0
b)5(13-2)+4=5-4(7-4)
3)30+30+10=70
200+300+60
Răspuns:
1. 1,7,13,19,25,29,35,39 (+6)
2. a. 2x×2x-7x-9=0/+9
2x×2x-7x=9
Răspuns:
1.a)24,27,33,39
b)4×20=80
2)22²-72-9=0
b)5(13-2)+4=5-4(7-4)
3)30+30+10=70
200+300+60