[(3a-2b)^2-(3a+2b)(3a-2b)]÷(2b-3a)

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[(3a-2b)^2-(3a+2b)(3a-2b)]÷(2b-3a)
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[(3a-2b)^2-(3a+2b)(3a-2b)]÷(2b-3a)
[(3a-2b)^2-(3a+2b)(3a-2b)]÷(2b-3a)

[(3a-2b)^2-(3a+2b)(3a-2b)]÷(2b-3a)
[(3a-2b)^2-(3a+2b)(3a-2b)]÷(2b-3a)
=(3a-2b)^2÷(2b-3a)-(3a+2b)(3a-2b)÷(2b-3a)
=[(-1)*(2b-3a)]^2÷(2b-3a)-(3a+2b)*[-1*(2b-3a)]÷(2b-3a)
=(-1)^2*(2b-3a)^2÷(2b-3a)+(3a+2b)*(2b-3a)÷(2b-3a)
=(2b-3a)+(3a+2b)
=4b

=-[(3a-2b)^2-(3a+2b)(3a-2b)]÷(3a-2b)
=-(3a-2b)+(3a+2b)
=4b