-3x²y³×(x²-1)-(x²+1)×5x²y³

问题描述:

-3x²y³×(x²-1)-(x²+1)×5x²y³

-3x²y³×(x²-1)-(x²+1)×5x²y³= [-3×(x²-1)-(x²+1)×5]x²y³=(-8x²-2)x²y³=-8x⁴y³-2x²y³