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in the question 6radical x +3 radical y -2radical y +3 radical x -radical y is the answer 9 radical x +1 radical y. i just don't get it thanks

  • math -

    6√x + 3√y - 2√y + 3√x - √y
    = 9√x

    (6apples + 3 oranges - 2 oranges + 3 apples - 1 orange
    = 9 apples)

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