我要过程加带思路,当我是个成绩差的在校中学生来讲!
谢谢!
原式=(2+2√2 +√2 +2)√2 -6
=4√2 +6-6
=4√2
(√2+1)(√2+2)√2 - 6
=(√2+1)(1+√2)√2√2 - 6
= 2(√2+1)^2 - 6
= 2 ( 2+2√2+1 ) - 6
= 4√2