Question

（负1）的2011次方加（2分之1）的负一次方减（根号8减根号2）的0次方加根号2加一分之根号2减一.

Answer 1

=-1+2-1+(√2-1)²/(√2+1)(√2-1)

=0+(2-2√2+1)/(2-1)

=3-2√2