计算:5(3a^2b-ab^2)-4(-ab^2+3a^2b)其中a=-2b=3
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计算:5(3a^2b-ab^2)-4(-ab^2+3a^2b)其中a=-2b=3计算:5(3a^2b-ab^2)-4(-ab^2+3a^2b)其中a=-2b=3计算:5(3a^2b-ab^2)-4(-
计算:5(3a^2b-ab^2)-4(-ab^2+3a^2b)其中a=-2b=3
计算:5(3a^2b-ab^2)-4(-ab^2+3a^2b)其中a=-2b=3
计算:5(3a^2b-ab^2)-4(-ab^2+3a^2b)其中a=-2b=3
5(3a^2b-ab^2)-4(-ab^2+3a^2b)
=15a^2b-5ab^2+4ab^2-12a^2b
=15a^2b-12a^2b-5ab^2+4ab^2
=3a^2b-ab^2
=ab(3a-b)
=-2*3*[3*(-2)-3]
=-6*(-9)
=54
5(3a^2b-ab^2)-4(-ab^2+3a^2b)
=15a^2b-5ab^2+4ab^2-12a^2b
=15a^2b-12a^2b-5ab^2+4ab^2
=3a^2b-ab^2
=ab(3a-b)
=-2*3*[3*(-2)-3]
=-6*(-9)
=54那么3x^2-[x^2-2(3x-x^2)]其中x=-73x^2-[x^2-...
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5(3a^2b-ab^2)-4(-ab^2+3a^2b)
=15a^2b-5ab^2+4ab^2-12a^2b
=15a^2b-12a^2b-5ab^2+4ab^2
=3a^2b-ab^2
=ab(3a-b)
=-2*3*[3*(-2)-3]
=-6*(-9)
=54
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