Question

Determinati numerele naturale a si b , astfel incat (a + 2 ) * ( b - 3) = 28

Answer 1

28=1x2x2x7

28=28 x1
(a+2)(b-3)  
a+2=28
a=26
b-3=1
b=4

28=4x7
(a+2)(b-3)  
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=0
b=3