(y的m次方)²×(-y³)如题,
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(y的m次方)²×(-y³)如题,(y的m次方)²×(-y³)如题,(y的m次方)²×(-y³)如题,(y的m次方)²×(-y&#
(y的m次方)²×(-y³)如题,
(y的m次方)²×(-y³)
如题,
(y的m次方)²×(-y³)如题,
(y的m次方)²×(-y³)
=-(y的2m次方)×(y³)
=-y的2m+3次方
原式=y^2m*(-y^3)
=-y^(2m+3)