Question

二分之一倍的根号2加根号3的和减去4分之3倍的根号2加根号27的和

Answer 1

1/2(√2+√3)-3/4(√2+√27)

=1/2√2+1/2√3-3/4√2-9/4√3

=(1/2-3/4)√2+(1/2-9/4)√3

=-1/4√2-7/4√3。