64-b3-12b(4-b)+b3=28
b2-4b+3=0
(b-1)×(b-3)=0
b=1, b=3
a=3, a=1
a2+b2=10
64-b3-12b(4-b)+b3=28
b2-4b+3=0
(b-1)×(b-3)=0
b=1, b=3
a=3, a=1
a2+b2=10
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