是根号8减2倍根号0.5的和减去根号9/8加根号50加2/3倍的根号72的和
问题描述:
是根号8减2倍根号0.5的和减去根号9/8加根号50加2/3倍的根号72的和
答
根号8减2倍根号0.5的和减去根号9/8加根号50加2/3倍的根号72
=[根号(2^2*2)-根号(2^2*0.5)]-[根号3^2*2/4^2+根号5^2*2+根号2^2/3^2*72]
=2根号2-根号2-3根号2/4-5根号2-4根号2
=-43根号2/4
答
根号8减2倍根号0.5的和减去根号9/8加根号50加2/3倍的根号72
=2根号2-2/2*根号2-3/4根号2+5根号2+2/3*3*2根号2
=根号2-3/4根号2+5根号2+4根号2
=10根号2-3/4根号2
=37/4*(根号2)