[(3a^2b-2ab^2)(4a^2-ab^2)-(2ab^2)^2]÷(-1/2a^2b^2)

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[(3a^2b-2ab^2)(4a^2-ab^2)-(2ab^2)^2]÷(-1/2a^2b^2)
[(3a^2b-2ab^2)(4a^2-ab^2)-(2ab^2)^2]÷(-1/2a^2b^2)

[(3a^2b-2ab^2)(4a^2-ab^2)-(2ab^2)^2]÷(-1/2a^2b^2)
[(3a^2b-2ab^2)(4a^2-ab^2)-(2ab^2)^2]÷(-1/2a^2b^2)
=(12a^4b-3a^3b^3-8a^3b^2+2a^2b^4-4a^2b^4)÷(-1/2a^2b^2)
=(12a^4b-3a^3b^3-8a^3b^2-2a^2b^4)÷(-1/2a^2b^2)
=-24a^2+6ab+16a+4b^2

(3a^2b-2ab^2)(4a^2-ab^2)
=12a^4b-3a^3b^3-8a^3b^2+2a^2b^4
所以(3a^2b-2ab^2)(4a^2-ab^2)-(2ab^2)^2
=12a^4b-3a^3b^3-8a^3b^2+2a^2b^4-4a^2b^4
=12a^4b-3a^3b^3-8a^3b^2-2a^2b^4
所以原式=(12a^4b-3...

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(3a^2b-2ab^2)(4a^2-ab^2)
=12a^4b-3a^3b^3-8a^3b^2+2a^2b^4
所以(3a^2b-2ab^2)(4a^2-ab^2)-(2ab^2)^2
=12a^4b-3a^3b^3-8a^3b^2+2a^2b^4-4a^2b^4
=12a^4b-3a^3b^3-8a^3b^2-2a^2b^4
所以原式=(12a^4b-3a^3b^3-8a^3b^2-2a^2b^4)/
=-12a^4b/(1/2a^2b^2)+3a^3b^3/(1/2a^2b^2)+8a^3b^2/(1/2a^2b^2)+2a^2b^4/(1/2a^2b^2)
=-24a^2/b+6ab+16a+4b^2

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a

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