计算:6x²y·(-4xy³);(-2x²)²·(-3x³y).
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计算:6x²y·(-4xy³);(-2x²)²·(-3x³y).
计算:6x²y·(-4xy³);(-2x²)²·(-3x³y).
计算:6x²y·(-4xy³);(-2x²)²·(-3x³y).
即
6x²y·(-4xy³)
=-6×4x³y^4
=-24x³y^4
(-2x²)²·(-3x³y).
=4x^4×(-3x³y)
=(-3×4)x^7y
=-12yx^7