573^2*31-427^2*31利用因式分解简便计算_数学解答

573^2*31-427^2*31利用因式分解简便计算

人气：454 ℃　时间：2020-03-20 13:04:46

解答

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