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a)
(a+b)(a-b)=13
a=7, b=6
b)
(6+6)(6-5)=11
a=6, b=6
c)
(9+8)(9-8)=17
a=9, b=8
d)
(15+14)(15-14)=29
a=15, b=14
a,b-N i a>b
a) P=13
(a+b)(a-b)=13
(7+6)(7-6)=13*1=13
a=7
b=6
b) P=11
(a+b)(a-b)=11
(6+5)(6-5)=11*1=11
a=6
b=5
c) P=17
(a+b)(a-b)=17
(9+8)(9-8)=17*1=17
a=9
b=8
d) P=29
(a+b)(a-b)=29
(15+14)(15-14)=29*1=29
a=15
b=14