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

Toán Lớp 9: rút gon : √12 + 2 √27 + 3 √75 -9 √48

Toán Lớp 9: rút gon : √12 + 2 √27 + 3 √75 -9 √48

Comments ( 2 )

  1. ${\sqrt[]{12} + 2\sqrt[]{27}  + 3\sqrt[]{75} – 9\sqrt[]{48}}$
    ${= \sqrt[]{2².3} + 2\sqrt[]{3².3}  + 3\sqrt[]{5².3} – 9\sqrt[]{4².3}}$
    ${= 2\sqrt[]{3} + 6\sqrt[]{3}  + 15\sqrt[]{3} – 36\sqrt[]{3}}$
    ${= -13\sqrt[]{3}}$

  2. Giải đáp + giải thích :
     

    toan-lop-9-rut-gon-12-2-27-3-75-9-48

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