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

Toán Lớp 8: √6,5- √12 – √6,5+ √12 + 2 √5

Toán Lớp 8: √6,5- √12 – √6,5+ √12 + 2 √5

Comments ( 2 )

  1. $\sqrt{6,5}-\sqrt{12}-\sqrt{6,5}+\sqrt{12}+2\sqrt{5}$
    $=(\sqrt{6,5}-\sqrt{6,5})-(\sqrt{12}-\sqrt{12})+2\sqrt{5}$
    $=0-0+2\sqrt{5}$
    $=2\sqrt{5}$

  2. $\sqrt{6,5} – \sqrt{12} – \sqrt{6,5} + \sqrt{12} + 2\sqrt{5}$
    $= ( \sqrt{6,5} – \sqrt{6,5} ) + (-\sqrt{12} + \sqrt{12} )+ 2\sqrt{5}$
    $= 0 + 0 + 2\sqrt{5}$
    $=2\sqrt{5}$

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