A = √ 18 − 2 √ 50 + 3 √ 8 ; B = √ 27 − 6 √ 1 3 + √ 3 − 3 √ 3 ; C = 5 √ 7 + √ 2 − √ 8 − 2 √ 7 + √ 2

By Allison

A = √ 18 − 2 √ 50 + 3 √ 8 ; B = √ 27 − 6 √ 1 3 + √ 3 − 3 √ 3 ; C = 5 √ 7 + √ 2 − √ 8 − 2 √ 7 + √ 2

0 bình luận về “A = √ 18 − 2 √ 50 + 3 √ 8 ; B = √ 27 − 6 √ 1 3 + √ 3 − 3 √ 3 ; C = 5 √ 7 + √ 2 − √ 8 − 2 √ 7 + √ 2”

  1. a) $A = \sqrt{18} – 2\sqrt{50} + 3\sqrt{8}$

    $= \sqrt{9.2} – 2\sqrt{25.2} + 3\sqrt{4.2}$

    $= 3\sqrt{2} – 2.5\sqrt{2} + 3.2\sqrt{2}$

    $= -\sqrt{2}$

    b) $B = \sqrt{27} – 6\sqrt{13} + \sqrt{3} – 3\sqrt{3}$

    $= \sqrt{9.3} – 6\sqrt{13} – 2\sqrt{3}$

    $= 3\sqrt{3} – 6\sqrt{13} – 2\sqrt{3}$

    $= \sqrt{3} – 6\sqrt{13}$

    c) $C = 5\sqrt{7} + \sqrt{2} – \sqrt{8} – 2\sqrt{7} + \sqrt{2}$

    $= 3\sqrt{7} + \sqrt{2} – \sqrt{4.2} + \sqrt{2}$

    $= 3\sqrt{7} + 2\sqrt{2} – 2\sqrt{2}$

    $= 3\sqrt{7}$.

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