题目

急呀,写出过程方括号代表根号
（1）[18]-2/[2]-[8]/2+([5]-1)0次方（2）1/[2]-1+[3]([3]-[6])+[8](3)[8]+[1/2]-[9/2]-[3/2]+[6]-[24]

提问时间：2021-03-30

答案

(1)√18-2/√2-√8/2+(√5-1)0次方
=3√2-(√2)^2/√2-2√2/2+1
=3√2-√2-√2+1
=√2+1
(2)1/(√2-1)+√3(√3-√6)+√8
=(√2+1)/(√2-1)(√2+1)+√3*√3-√3*√6+2√2
=(√2+1)/(2-1)+3-√18+2√2
=√2+1+3-3√2+2√2
=4
(3)√8+√(1/2)-√(9/2)-√(3/2)+√6-√24
=2√2+√2/2-3√2/2-√6/2+√6-2√6
=√2-(3/2)*√6