Question

二次根式的乘除混合运算

1.(2√3-3√2+√6)(√6-5√3)
2.(√6+√2)÷2√3

Answer 1

1.(2√3-3√2+√6)(√6-5√3)

=6√2-30-6√3+15√6+6-15√2

=-9√2-24-6√3+15√6

2.(√6+√2)÷2√3  分子分母同乘√3

 =（3√2+√6)/6

Answer 2

⑨(3√6-√4)2
=(3√6)^2-2*3√6*√4+(√4)^2
=54-12√6+4
=58-12√6
⑩（1+√2-√3）（1-√2+√3）
=[1+(√2-√3)][1-(√2-√3)]
=1-(√2-√3)^2
=1-(2+3+2√6)
=-4-2√6①5√8-2√32+√50
=5*3√2-2*4√2+5√2
=√2(15-8+5)
=12√2
②√6-√3/2-√2/3
=√6-√6/2-√6/3
=√6/6
③(√45+√27)-(√4/3+√125)
=(3√5+3√3)-(2√3/3+5√5)
=-2√5+7√5/3
④(√4a-√50b)-2(√b/2+√9a)
=(2√a-5√2b)-2(√2b/2+3√a)
=-4√a-6√2b
⑤√4x*(√3x/2-√x/6)
=2√x(√6x/2-√6x/6)
=2√x*(√6x/3)
=2/3*|x|*√6
⑥(x√y-y√x)÷√xy
=x√y÷√xy-y√x÷√xy
=√x-√y
⑦(3√7+2√3)(2√3-3√7)
=(2√3)^2-(3√7)^2
=12-63
=-51
⑧(√32-3√3)(4√2+√27)
=(4√2-3√3)(4√2+3√3)
=(4√2)^2-(3√3)^2
=32-27
=5
Y△▆¤d二次根式的乘除混合运算O学什么，都要自身的努力加方法，要增加知识量。这样才是无敌的。我刚购买了逍遥速读训练软件非常的不错，taobao有卖的。让我学习效率增加了10倍不止啊。赞1个的2011-7-15 23:47:40▲

Answer 3

共3条
1.(2√3-3√2+√6)(√6-5√3)
=6√2-30-6√3+15√6+6-15√2
=-9√2-24-6√3+15√6
2.(√6+√2)÷2√3 分子分母同乘√3
=（3√2+√6)/6

Answer 4

1.(2√3-3√2+√6)(√6-5√3)
=6√2-30-6√3+15√6+6-15√2
=-9√2-24-6√3+15√6
2.(√6+√2)÷2√3
=（3√2+√6)/6

Answer 5

现在计算器这么好用，建议买一个科学计算器就好