-3x²y³×(x²-1)-(x²+1)×5x²y³
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/15 04:19:28
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-3x²y³×(x²-1)-(x²+1)×5x²y³
-3x²y³×(x²-1)-(x²+1)×5x²y³
-3x²y³×(x²-1)-(x²+1)×5x²y³
-3x²y³×(x²-1)-(x²+1)×5x²y³
= [-3×(x²-1)-(x²+1)×5]x²y³
=(-8x²-2)x²y³
=-8x⁴y³-2x²y³
【解】-3x²y³×(x²-1)-(x²+1)×5x²y³
==-3x^4y³+3x²y³-5x^4y³+5x²y³
==-7x^4y³+8x²y³
-3x²y³×(x²-1)-(x²+1)×5x²y³
= [-3×(x²-1)-(x²+1)×5]x²y³
=[-3x²+3-5x²-5]
=(-8x²-2)x²y³
=-8x⁴y³-2x²y³