[(3ab-2)(3ab+2)+(2ab+2)²]/5ab=

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[(3ab-2)(3ab+2)+(2ab+2)²]/5ab=
[(3ab-2)(3ab+2)+(2ab+2)²]/5ab=

[(3ab-2)(3ab+2)+(2ab+2)²]/5ab=
(9a²b²-4+4a²b²+8ab+4)/5ab
=(13a²b²+8ab)/5ab
=13/5ab+8/5
根据平方差公式和完全平方式

原式=(9a²b²-4+4a²b²+8ab+4)/5ab
=(13a²b²+8ab)/5ab
=(13ab+8)/5

[(3ab-2)(3ab+2)+(2ab+2)2]/5ab
=(9a^2b^2-4+4a^2b^2+8ab+4)/5ab
=(13a^2b^2+8ab)/5ab
=13/5ab+8/5