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5 July, 19:01

If x+y = 3, xy = 2 what is the value of x 3+y3

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Answers (2)
  1. 5 July, 19:07
    0
    - 18

    Step-by-step explanation:

    As

    (x+y) ^3=x^3+y^3+3xy (x+y)

    By substituting values,

    27-18=x^3+y^3

    ="x^3+y^3=9
  2. 5 July, 19:22
    0
    X+y=3. X=3-y. X=3-y. (1)

    X. y=2. Y. (3-y) = 2. 3y-y^2=2 (2)

    (2). - y^2+3y=2

    0=Y^2-3y+2

    Y=1. X=3-1. X=2

    Y=2. X=3-2. X=1
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