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

Toán Lớp 9: Bài 1: tính √12+5√3-√48 √18-2√32+3√50-4√8 2√5-2√108+3√20+5√27

Toán Lớp 9: Bài 1: tính
√12+5√3-√48
√18-2√32+3√50-4√8
2√5-2√108+3√20+5√27

Comments ( 1 )

  1. Giải đáp:
    $\displaystyle \begin{array}{{>{\displaystyle}l}} a.\ 3\sqrt{3}\\ b.\ 2\sqrt{3}\\ c.\ 8\sqrt{5} +3\sqrt{3} \end{array}$
    Lời giải và giải thích chi tiết:
    $\displaystyle \begin{array}{{>{\displaystyle}l}} a.\ \sqrt{12} +5\sqrt{3} -\sqrt{48} =2\sqrt{3} +5\sqrt{3} -4\sqrt{3} =3\sqrt{3}\\ b.\ \sqrt{18} -2\sqrt{32} +3\sqrt{50} -4\sqrt{8}\\ =3\sqrt{2} -2.4\sqrt{2} +3.5\sqrt{2} -4.2\sqrt{2}\\ =2\sqrt{2}\\ c.\ 2\sqrt{5} -2\sqrt{108} +3\sqrt{20} +5\sqrt{27}\\ =2\sqrt{5} -2.6\sqrt{3} +3.2\sqrt{5} +5.3\sqrt{3}\\ =8\sqrt{5} +3\sqrt{3} \end{array}$

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