化简求值:①5(3a²b-ab²)-4(-ab²+3a²b),其中a=-2,b=3
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化简求值:①5(3a²b-ab²)-4(-ab²+3a²b),其中a=-2,b=3
化简求值:①5(3a²b-ab²)-4(-ab²+3a²b),其中a=-2,b=3
化简求值:①5(3a²b-ab²)-4(-ab²+3a²b),其中a=-2,b=3
5(3a²b-ab²)-4(-ab²+3a²b)
=15a²b-5ab²+4ab²-12a²b
=3a²b-ab²
=ab(3a-b)==54