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问题: 数学计算题

(-2/3x³y²)·9/16x³y^4 =______.

解答:

(-2/3x3y2)·9/16x3y^4
=-2*9/3x^3y^2*16x^3y^4
=-3/8x^6y^6

(-2/3)x^3y^2·(9/16)x^3y^4
=-(3/8)x^6y^6