573^2*31-427^2*31利用因式分解简便计算
问题描述:
573^2*31-427^2*31利用因式分解简便计算
答
573²×31-427²×31
=31(573²-427²)
=31(573+427)(573-427)
=31×1000×146
=4526000
答
573^2*31-427^2*31=(573^2-427^2)*31=(573+427)(573-427)*31=1000×(573-427)×31=
146×31000=4526000
答
573^2*31-427^2*31
=31x(573^2-427^2)
=31x(573+427)(573-427)
=31x1000x146
=31x146000
=(30+1)x146000
=30x146000+146000
=4380000+146000
=4526000