根号2分之2加根号2
=√2/2+√2
=√2/2+(2√2)/2
=(3√2)/2
=3/2*√2您题目没写对）☆(⌒-⌒; )更正：根号2分之2加根号2=2/√2+√2=(2√2)/2+(2√2)/2=(4√2)/2=2√2