1/4+SQR[5A]+30SQR[2]+1/3-SQR[66-40SQR[2]] 怎么计算啊?_数学解答

1/4+SQR[5A]+30SQR[2]+1/3-SQR[66-40SQR[2]] 怎么计算啊?

人气：320 ℃　时间：2020-06-16 14:38:37

解答

=(1/4+1/3)+30根号2+根号5A-根号[(5根号2)^2-2*4*(5根号2)+4^2]
=7/12+30根号2+根号5A-(5根号2-4)
=7/12+25根号2+根号5A+4