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    Hi, In a textbook it says:
    " Show that if neither x nor y is equal to 0, then root x and y is never equal to root x and root y."
    I dont understand this question at all, i'm in year 12. someone please simplify this question and help me with this please!!
    Thankyou
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    (Original post by Chelsea12345)
    Hi, In a textbook it says:
    " Show that if neither x nor y is equal to 0, then root x and y is never equal to root x and root y."
    I dont understand this question at all, i'm in year 12. someone please simplify this question and help me with this please!!
    Thankyou
    That can't be what it says exactly - what does it say exactly? Is there another part of the question?
    By and do you mean plus?
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    (Original post by Chelsea12345)
    Hi, In a textbook it says:
    " Show that if neither x nor y is equal to 0, then root x and y is never equal to root x and root y."
    I dont understand this question at all, i'm in year 12. someone please simplify this question and help me with this please!!
    Thankyou
    Huh?

    \sqrt{xy}=\sqrt{x} \cdot \sqrt{y}

    If neither root x nor root y is equal to 0, then root of xy is not 0.
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    (Original post by ValerieKR)
    That can't be what it says exactly - what does it say exactly? Is there another part of the question?
    " Show that If neither x nor y is equal to 0 , then √x+y is never equal to √x + √y."
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    (Original post by Chelsea12345)
    " Show that If neither x nor y is equal to 0 , then √x+y is never equal to √x + √y."
    square both of them
    the first one you get
    x+y
    the second one you get x+y+2root(xy)

    subtract them to find the difference
    2root(xy)
    they are equal when this = 0
    2root(xy)=0
    root(xy)=0
    xy=0
    x or y = 0

    therefore if neither x nor y is 0 the difference cannot be 0 and they cannot be equal
 
 
 
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