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

Toán Lớp 9: √(4 √6+8 √3+4 √2+18)Rút gọn biểu thức

Toán Lớp 9: √(4 √6+8 √3+4 √2+18)Rút gọn biểu thức

Comments ( 2 )

  1. \sqrt{4\sqrt{6}+8\sqrt{3}+4\sqrt{2}+18}
    =\sqrt{(2\sqrt{3}+2+\sqrt{2})^2}
    =2\sqrt{3}+2+\sqrt{2}
     

  2. Giải đáp:
    \sqrt{4sqrt6+8sqrt3+4sqrt2+18}
    =sqrt{12+4+2+2.2sqrt{3}.2+2.2\sqrt{3}.2+2.2.\sqrt2}
    =\sqrt{(2\sqrt3+2+\sqrt2)^2}
    =|2\sqrt3+2+\sqrt2|
    =2+2\sqrt3+\sqrt2

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