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求来自20道二次根式计算题,含过程和答案

问题补充说明:一定要有过程和答案

求来自20道二次根式计算题,含过程和答案

1.X(2-√2)=(√2-2)

X(2-√2)=(√2-2)

X(2-√2)=-1(2-√2)

x=1

2.(√5+√2)²-(√5-√2)²

=(√5+√2+√5-√2)(√5+√2-√5+√2)

=2√5*2√2

=4√10

3.√8+3√(1/3)-1/(√2)+(√3)/2

=2√2+3*(√3)/3-(√2)/2+(√3)/2

=2√2+√3-(√2)高务顶批/2+(√3)/2

=(3/2)√3+(3/2)具沉费留危压敌谈√2

4.(√3+√2+√5)(√3-√2-√布比信良展历积5)

=(√3+√2+√5)[√3-(√2+√5)]

=(√3)²-(√2360问答+√5)²

=3-(2队临务护防温角什米官室+5+2√10)

=3-7-2√10

=-4-2√10

5.√8-2√32+√50

=5*3√2-2*4√2+5√2

=√2(15-8+5)

=12√2

6.√6-√方民伤找脚轴朝采自研3/2-√2/3

=√6-√粉马画还命心6/2-√6/3

=√6/6

7.双优无言根空祖对(√45+√27)-(√4/3+√125)

=(3权使米打热阶义纸√5+3√3)-(2√3/3+5√5)

=-2√5+7√5/3

8.(√4a-√50b)-2(√b/2+√9a)

=(2√a-5√2b)-2(√2b/2+3√a)

=-4√a-6√2b

9.(√32-3√3)(本排念孩齐4√2+√27)

=(4√2-3√3)(4√2+3√3)

=(4√2)^2-(3√3)^2

=32-27

=5

10.1+√2-√3)(1-√2+√3)

=[1+(√2-√3)][1-(√2-√3)]

=1-(√2-√3)^2

=1-(2+3+2√双随均云被称我而师6)

=-4-2√6

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