-mn(-5)m²n³p= 5m³n⁴p
3m²n(-1/3)m= -m³n
(-3m²n)³= -3m^6n³
3x²+0.5x-9+9(3х²) при х=-4 = 10(3х²)+0.5х-9=(30×16)+(-2)-9=480-11=469
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-mn(-5)m²n³p= 5m³n⁴p
3m²n(-1/3)m= -m³n
(-3m²n)³= -3m^6n³
3x²+0.5x-9+9(3х²) при х=-4 = 10(3х²)+0.5х-9=(30×16)+(-2)-9=480-11=469