初三上学期数学二次根式计算题..急用!

1个回答

  • (1) √18a+√2a-√32a

    = 3√2a+√2a-4√2a

    =0

    (2) √(3√27-2√48)/√3

    = √(9√3-8√3)/√3

    = √(√3)/√3

    = √1

    =1

    (3)√12-(√3 +1)^2+√3/4

    =2√3-(3+2√3 +1)+√3/4

    =-4+√3/4

    (4)(∏+1)^0-√12 +丨-√3丨

    =1-2√3 +√3

    =1- √3

    (5)2√3 *(1/√6 +1/√2)

    =2√3 *(√6/6 + √2/2)

    =√2 + √6

    (6)2/3√9x +6√x/36

    =2√x +√x

    =3√x