Question

Determinati numerele naturale a si b astfel incat (a+b).(b-3)=28

Answer 1

1.
28=1x28
a+2=1  ⇒a=-1
b-3=28 ⇒b=31

28=2x14
a+2=2  ⇒a=0
b-3=14 ⇒b=17

28=4x7
a+2=4  ⇒a=2
b-3=7 ⇒b=10

28=7x4
a+2=7  ⇒a=5
b-3=4 ⇒b=7

28=14x2
a+2=14  ⇒a=12
b-3=2 ⇒b=5

28=28x1
a+2=28  ⇒a=26
b-3=1 ⇒b=4