Question

ab=? ba+ab si ba-ab =p.p

Answer 1

10b+a+10a+b-pp
10b+a-10a-b-pp

11b+11a-pp
9a+9b-pp

11(a+b)-pp
9(a+b)-pp

•11×11-pp
pt a=1,b=1
ab=11

11×11^3-pp
dar a,b trebuie sa fie cifre, deci nu merge

•9×9-pp
pt a=1,b=8
a=2,b=7
a=3,b=6
a=4,b=5
a=5,b=4
a=6,b=3
a=7,b=2
a=8,b=1
a=9,=0

ab=11,18,27,36,45,54,63,72,81,90.


Sper ca te am ajutat!:)