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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 9: Thực hiện phép tính: a) 2 căn 6 – căn 12 + 3 căn 2

Toán Lớp 9: Thực hiện phép tính:
a) 2 căn 6 – căn 12 + 3 căn 2

Comments ( 2 )

  1. a) 2sqrt6 -sqrt12 +3sqrt2

    =2sqrt6 -sqrt{3*4} +3sqrt2

    =2sqrt6 -sqrt3 *sqrt4 +3sqrt2

    =2sqrt6 -sqrt3 *sqrt2^2 +3sqrt2

    =2sqrt6-2sqrt3+3sqrt2

  2. 2\sqrt{6}-\sqrt{12}+3\sqrt{2}=2\sqrt{6}-2\sqrt{3}+3\sqrt{2}

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222-9+11+12:2*14+14 = ? ( )