[(3a-b)2-(3a+b)(3a-b)]÷2b等于多少?

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[(3a-b)2-(3a+b)(3a-b)]÷2b等于多少?[(3a-b)2-(3a+b)(3a-b)]÷2b等于多少?[(3a-b)2-(3a+b)(3a-b)]÷2b等于多少?原式=(9a

[(3a-b)2-(3a+b)(3a-b)]÷2b等于多少?
[(3a-b)2-(3a+b)(3a-b)]÷2b等于多少?

[(3a-b)2-(3a+b)(3a-b)]÷2b等于多少?
原式=(9a²-6ab+b²-9a²+b²)÷2b
=(-6ab+2b²)÷2b
=-3a+b

原式=(9a²-6ab+b²-9a²+b²)÷2b
=(-6ab+2b²)÷2b
=-3a+b

=【6a-2b-(9a平方-b平方)】/2b
=(6a-9a平方)/2b+b/2-1
(3a-b)后2如果是平方则为-3a+b