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1.-3x^2×(-2x^2+1/4x-1)2.(-5x^2)×(-2y)+3xy(1-3x)3.(-4a^2b)^2×(1/2a^2b^2-3ab-5b^2)4.5x^3×x^2+(-3x^3)^2-(-x^2)^3

题目详情
1.-3x^2×(-2x^2+1/4x-1)
2.(-5x^2)×(-2y)+3xy(1-3x)
3.(-4a^2b)^2×(1/2a^2b^2-3ab-5b^2)
4.5x^3×x^2+(-3x^3)^2-(-x^2)^3
▼优质解答
答案和解析
1.-3x^2×(-2x^2+1/4x-1)=6x^4 - (3/4)·x³ + 3x².2.(-5x^2)×(-2y)+3xy(1-3x)=5x²y +3xy-9x²y=-4x²y +3xy=xy(-4x+3).3.(-4a^2b)^2×(1/2a^2b^2-3ab-5b^2)=-2a^4·b^4 + 12a³b³...