Question:

Solve 2x^2 - 3xy + y^2?

by Guest63114  |  earlier

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so lost!

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  1. 2x^2 - 3xy^2


  2. 2x^2 - 3xy + y^2

    write -3xy as -2xy - xy, it becomes like this

    2x^2 - 2xy - xy + y^2

    Now take 2x common from first 2 terms and -y from last 2 terms, it will become,

    2x(x - y) - y(x - y)

    Now take (x - y) common from the above equation, you will have it simplified as

    (2x - y) (x - y)

    Simplified.

  3. i think it would be

    -6x^3y^3

    but im noy POSITIVE.  

  4. u mean factor?

    (2x-y)(x-y)

  5. =(2x-y)(x-y)

  6. (2x-y)(x-y)

  7. When factoring, you need to reverse the FOIL process (First, Inside, Outside, Last).

    Two factors will multiply to the starting expression.  Start with the first value (2x^2).  Two values that will multiply to this are 2x and x.  So....

    (2x +  )(x +  )

    Two values that will multiply to y^2 are y and y. So....

    (2x + y)(x + y)

    Multiply this out using the FOIL method...

    2x^2 + yx + 2xy + y^2

    2x^2 + 3xy + y^2

    Note that the inside value is +3xy not -3xy.  You need to play with signs.

    Try

    (2x - y)(x - y)

    2x^2 - yx - 2xy + y^2

    2x^2 - 3xy + y^2

    That is your starting expression, so the answer is...

    (2x - y)(x - y)

    ------------

    Note that

    (y - 2x)(y - x) is also a valid solution

  8. (2x-y)(x-y) is the factored form

    If the equation is equal to 0, then x = (1/2)y Or x=y

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