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

Toán Lớp 9: 5 *căn bậc hai(72) -12 *căn bậc hai(18) + 4 *căn bậc hai(8)

Toán Lớp 9: 5 *căn bậc hai(72) -12 *căn bậc hai(18) + 4 *căn bậc hai(8)

Comments ( 2 )

  1. Giải đáp + giải thích :
     

    toan-lop-9-5-can-bac-hai-72-12-can-bac-hai-18-4-can-bac-hai-8

  2. \color{Yellow}{\text{Táo Vàng}}
    5\sqrt{72} – 12\sqrt{18} + 4\sqrt{8}
    = 30\sqrt{2} – 36\sqrt{2} + 8\sqrt{2}
    = 30\sqrt{2} + (-36\sqrt{2} + 8\sqrt{2})
    = 30\sqrt{2} – 28\sqrt{2}
    = 2\sqrt{2}

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

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